diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..45754bd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.test/dist/
diff --git a/.test/dist/.gitkeep b/.test/dist/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/.vscode/settings.json b/.vscode/settings.json
index d2ab49a..1a5e063 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,13 +1,15 @@
 {
-    "editor.fontSize": 18,
-    "workbench.colorTheme": "PowerShell ISE",
-    "workbench.colorCustomizations": {
-        "editor.selectionBackground": "#99c8ef96",
-        "editor.selectionHighlightBackground": "#99C9EF",
-        "editor.lineHighlightBackground": "#ffffff"
-    },
-    "files.defaultLanguage": "powershell",
-    "files.associations": {
-        "*.wsb": "xml"
-    }
+  // "editor.fontFamily": "Cascadia Code, jetbrains mono, 'Courier New', monospace", // fallback fonts
+  "editor.fontSize": 18,
+  "workbench.colorTheme": "Default Dark Modern",
+  "workbench.colorCustomizations": {
+    "editor.lineHighlightBackground": "#202020",
+    "editor.selectionHighlightBackground": "#141414",
+    "editor.selectionHighlightBorder": "#b3ff00",
+    "editor.background": "#0A0A0A"
+  },
+  "files.defaultLanguage": "powershell",
+  "files.associations": {
+    "*.wsb": "xml"
+  }
 }
\ No newline at end of file
diff --git a/azure/crate-azure-vm.ps1 b/azure/crate-azure-vm.ps1
new file mode 100644
index 0000000..ea5f8a4
--- /dev/null
+++ b/azure/crate-azure-vm.ps1
@@ -0,0 +1,71 @@
+# Azure VM Creation Script - Debian 11
+# This script creates a Debian 11 VM in Azure with a predefined network security group allowing SSH access.
+# Prerequisites:
+# - Azure CLI installed and logged in (`az login`)
+# - A resource group named "Playground" with a network security group "ssh-common-ngs" allowing SSH on port 22.
+
+$SUBSCRIPTION_ID = '7f796072-6602-418a-8ba9-92ebc9a4797d'
+$VM_NAME = 'vmDebian11'
+$USER = 'alan'
+$PASSWORD = 'F897cab3c9f1475d8a7ff96d549358f2.#1A'
+$LOC = 'polandcentral' # `az account list-locations -o table`
+$NGS = "/subscriptions/$SUBSCRIPTION_ID/resourcegroups/Playground/providers/Microsoft.Network/networkSecurityGroups/ssh-common-ngs" # Pre-created NSG with SSH allowed on port 22.
+$RG = "playground-azure-vm-rg-001"
+
+az account set --subscription $SUBSCRIPTION_ID
+
+Write-Host "Deleting old resource group" -ForegroundColor Magenta
+Start-Job -ScriptBlock {
+    az group delete -n "playground-azure-vm-rg-000" -y
+} | Out-Null
+
+Write-Host "Creating resource group: $RG" -ForegroundColor Green
+az group create -n $RG -l $LOC | Out-Null
+
+Write-Host "Creating VNet and Public IP in parallel" -ForegroundColor Green
+$vnetJob = Start-Job {
+    az network vnet create `
+        -g $using:RG `
+        -n "$using:VM_NAME-vnet" `
+        --address-prefix 10.0.0.0/16 `
+        --subnet-name "$using:VM_NAME-subnet" `
+        --subnet-prefix 10.0.0.0/24 | Out-Null
+}
+
+$ipJob = Start-Job {
+    az network public-ip create `
+        -g $using:RG `
+        -n "$using:VM_NAME-pip" `
+        --sku Standard `
+        --allocation-method Static | Out-Null
+}
+
+Wait-Job $vnetJob, $ipJob | Receive-Job
+
+Write-Host "Creating NIC" -ForegroundColor Green
+az network nic create `
+    -g $RG `
+    -n "$VM_NAME-nic" `
+    --vnet-name "$VM_NAME-vnet" `
+    --subnet "$VM_NAME-subnet" `
+    --public-ip-address "$VM_NAME-pip" `
+    --network-security-group $NGS | Out-Null
+
+Write-Host "Creating VM" -ForegroundColor Green
+az vm create `
+    -g $RG `
+    -n $VM_NAME `
+    --nics "$VM_NAME-nic" `
+    --image Debian11 `
+    --admin-username $USER `
+    --admin-password $PASSWORD `
+    --size Standard_B1ms | Out-Null
+
+Write-Host "Done. You can connect to the VM using:" -ForegroundColor Green
+$publicIP = az network public-ip show `
+    -g $RG `
+    -n "$VM_NAME-pip" `
+    --query "ipAddress" `
+    -o tsv
+
+ssh $USER@$publicIP -o StrictHostKeyChecking=no user@$publicIP
\ No newline at end of file
diff --git a/choco/choco upgrade update all and hibernate.bat b/choco/choco upgrade update all and hibernate.bat
new file mode 100644
index 0000000..815444f
--- /dev/null
+++ b/choco/choco upgrade update all and hibernate.bat	
@@ -0,0 +1,3 @@
+choco upgrade all -y
+%windir%\system32\rundll32.exe powrprof.dll,SetSuspendState
+pause
\ No newline at end of file
diff --git a/debian/gen-cpu-load.sh b/debian/gen-cpu-load.sh
new file mode 100644
index 0000000..4c8645f
--- /dev/null
+++ b/debian/gen-cpu-load.sh
@@ -0,0 +1,3 @@
+yes > /dev/null &
+sleep 50
+kill $!
diff --git a/debian/install-docker.sh b/debian/install-docker.sh
new file mode 100644
index 0000000..4c2fc6a
--- /dev/null
+++ b/debian/install-docker.sh
@@ -0,0 +1,17 @@
+# Add Docker's official GPG key:
+sudo apt-get update
+sudo apt-get install ca-certificates curl
+sudo install -m 0755 -d /etc/apt/keyrings
+sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
+sudo chmod a+r /etc/apt/keyrings/docker.asc
+
+# Add the repository to Apt sources:
+ARCH=$(dpkg --print-architecture)
+CODENAME=$(source /etc/os-release && echo "$VERSION_CODENAME")
+REPO_URL="deb [arch=$ARCH signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $CODENAME stable"
+echo "$REPO_URL" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+sudo apt-get update
+
+# Install latest version
+sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
\ No newline at end of file
diff --git a/debian/tmux.md b/debian/tmux.md
new file mode 100644
index 0000000..0590dbb
--- /dev/null
+++ b/debian/tmux.md
@@ -0,0 +1,53 @@
+# Cheat Sheet: tmux
+
+### 🏆 **Basic Commands:**
+
+```bash
+tmux new -s abc             # Create a new session named "abc"
+tmux ls                     # List all sessions
+tmux attach -t abc          # Attach to a session
+tmux detach                 # Detach (Ctrl + B, then D also works)
+tmux switch-client -t abc   # switch to the other session without nesting
+tmux kill-session -t abc    # Kill a session
+tmux kill-server            # Kill all sessions
+```
+
+---
+
+### ⚙️ **Pane Management:**
+
+| Action                              | Shortcut               |
+| ----------------------------------- | ---------------------- |
+| **Split vertically (left/right)**   | `Ctrl + B` → `%`       |
+| **Split horizontally (top/bottom)** | `Ctrl + B` → `"`       |
+| **Switch panes**                    | `Ctrl + B` → Arrow key |
+| **Close current pane**              | `Ctrl + D`             |
+| **Resize pane**                     | `Ctrl + B` → `:` then: |
+| Shrink down                         | `resize-pane -D 5`     |
+| Shrink up                           | `resize-pane -U 5`     |
+| Shrink left                         | `resize-pane -L 5`     |
+| Shrink right                        | `resize-pane -R 5`     |
+
+---
+
+### 🌐 **Window (Tab) Management:**
+
+| Action               | Shortcut         |
+| -------------------- | ---------------- |
+| **List windows**     | `Ctrl + B` → `W` |
+| **Rename window**    | `Ctrl + B` → `,` |
+| **New window (tab)** | `Ctrl + B` → `C` |
+| **Next window**      | `Ctrl + B` → `N` |
+| **Previous window**  | `Ctrl + B` → `P` |
+| **Close window**     | `Ctrl + B` → `&` |
+
+---
+
+### 📌 **Session Management:**
+
+| Action                  | Shortcut                              |
+| ----------------------- | ------------------------------------- |
+| **Detach from session** | `Ctrl + B` → `D`                      |
+| **Switch sessions**     | `Ctrl + B` → `S`                      |
+| **Rename session**      | `Ctrl + B` → `$`                      |
+| **Kill session**        | `Ctrl + B` → `:` then: `kill-session` |
diff --git a/development/.net/dotnet-publish.ps1 b/development/.net/dotnet-publish.ps1
new file mode 100644
index 0000000..b79516d
--- /dev/null
+++ b/development/.net/dotnet-publish.ps1
@@ -0,0 +1,3 @@
+dotnet publish -r win-x64 --self-contained -p:PublishSingleFile=true -c Release -o ./publish/win
+dotnet publish -r linux-x64 --self-contained -p:PublishSingleFile=true -c Release -o ./publish/linux
+dotnet publish -r osx-x64 --self-contained -p:PublishSingleFile=true -c Release -o ./publish/osx
\ No newline at end of file
diff --git a/development/ci/get-nuget.ps1 b/development/ci/get-nuget.ps1
new file mode 100644
index 0000000..1666945
--- /dev/null
+++ b/development/ci/get-nuget.ps1
@@ -0,0 +1,3 @@
+$nugetVersion = "6.7.0"  # Change to your required version
+$nugetUrl = "https://dist.nuget.org/win-x86-commandline/v$nugetVersion/nuget.exe"
+Invoke-WebRequest -Uri $nugetUrl -OutFile "nuget.exe"
\ No newline at end of file
diff --git a/development/environment-variables.ps1 b/development/environment-variables.ps1
new file mode 100644
index 0000000..47aeb99
--- /dev/null
+++ b/development/environment-variables.ps1
@@ -0,0 +1,23 @@
+# Environment Variable Lifetimes
+
+# 1. Session ($env:VARIABLE)
+$env:MY_VAR = "value1"
+Write-Host $env:MY_VAR
+
+# 1.1. Environment variable with dynamic key
+$key = "MY_VAR"
+Set-Item "env:$key" "value2"
+
+# 2. Process-Level Inheritance
+#   when you set an environment variable in PowerShell,
+#   it is inherited by child processes (like dotnet run, git, or other spawned applications).
+
+# 3. Permanent Environment Variables (Registry)
+[System.Environment]::SetEnvironmentVariable("MY_VAR", "value1", "User")
+Write-Host $env:MY_VAR
+
+# 4. Environment Variables in GitHubs Actions
+# Environment variables set during one step are not automatically available in subsequent steps in GitHub Actions.
+# To persist environment variables between steps, you need to explicitly use the GITHUB_ENV file.
+$value = "value1"
+echo "$key=$value" >> $env:GITHUB_ENV
\ No newline at end of file
diff --git a/development/ps/generic.ps1 b/development/ps/generic.ps1
new file mode 100644
index 0000000..a7d2dfa
--- /dev/null
+++ b/development/ps/generic.ps1
@@ -0,0 +1,12 @@
+# Workaround to call to a generic method OfType<T>() in PowerShell, when PowerShell cannot figure out <T> from the context
+
+# Method 1 - using OfType<T> method
+[System.Linq.Enumerable]::OfType[int](@(1, 2, 'a'))
+
+# Method 2 - using reflection
+$method = [System.Linq.Enumerable].GetMethod('OfType')
+$genericMethod = $method.MakeGenericMethod([int])
+$genericMethod.Invoke($null, @(, @(1, 2, 'a')))
+
+# Example of using Distinct method
+[System.Linq.Enumerable]::Distinct([int[]]@(1, 2, 3, 1, 2))
\ No newline at end of file
diff --git a/development/ps/reflection.ps1 b/development/ps/reflection.ps1
new file mode 100644
index 0000000..02b3afe
--- /dev/null
+++ b/development/ps/reflection.ps1
@@ -0,0 +1,25 @@
+# constructor
+$constructorInfo = [System.IO.FileInfo].GetConstructor([string].AsType())
+$constructorInfo = [System.IO.FileInfo].GetConstructor("public,instance", $types)
+$constructorInfo.Invoke('C:\Windows')
+
+# private field
+$obj = [System.IO.FileInfo]::new('C:\Windows')
+$field = [System.IO.FileInfo].GetField("_name", "nonpublic,instance")
+# longer version
+$field = [System.IO.FileInfo].GetField("_name", [System.Reflection.BindingFlags]::NonPublic -bor [System.Reflection.BindingFlags]::Instance)
+$field.GetValue($obj)
+
+# private method - static
+$obj = $null
+$privMethod = [System.DateTime].GetMember("DateToTicks", "nonpublic,static")
+$privMethod.Invoke($obj, @(2023, 10, 10))
+
+# private method - instance
+$obj = [System.DateTime]::Now
+$privMethod = [System.DateTime].GetMember("GetDatePart", "nonpublic,instance")
+$privMethod.Invoke($obj, @(0))
+
+# private method - args requirements
+$privMethod = [System.DateTime].GetMethod("DateToTicks", "nonpublic,static", $null, @([int], [int], [int]), @())
+$privMethod.Invoke($obj, @(2023, 10, 10))
\ No newline at end of file
diff --git a/dsc/README.md b/dsc/README.md
new file mode 100644
index 0000000..f326fc4
--- /dev/null
+++ b/dsc/README.md
@@ -0,0 +1,3 @@
+# Desired State Configuration 3.0
+
+- [ExtensionManifestV2Availability.dsc](https://developer.chrome.com/docs/extensions/develop/migrate/mv2-deprecation-timeline) - enable support for chrome extensions V2
\ No newline at end of file
diff --git a/dsc/run.ps1 b/dsc/run.ps1
new file mode 100644
index 0000000..c188cce
--- /dev/null
+++ b/dsc/run.ps1
@@ -0,0 +1,32 @@
+$validation = dsc config test -f .\validate.dsc.yml -o json | ConvertFrom-Json
+foreach ($r in $validation.results) {
+    if ($r.result.inDesiredState -eq $false) {
+        throw "[FAIL] $($r.name) [$($r.type)]"
+    }
+}
+
+Get-ChildItem .\steps -Filter '*.dsc.yml' -Recurse | ForEach-Object {
+    $step = $_.FullName
+    Write-Host "[INFO] Running step: $step" -ForegroundColor DarkGray
+    $test = dsc config test -f $step -o json | ConvertFrom-Json
+    $test.results | % {
+        if ($_.result.inDesiredState -eq $true) {
+            Write-Host "[OK] $($_.name) [$($_.type)]" -ForegroundColor Green
+        }
+        else {
+            Write-Host "[APPLY] $($_.name) [$($_.type)]" -ForegroundColor Yellow
+        }
+    }
+
+    [bool[]]$states = $test.results.result.inDesiredState
+    if ( $states.Contains($false)) {
+        $setResult = dsc config set -f $step -o json | ConvertFrom-Json
+        if ($LASTEXITCODE -ne 0) {
+            throw "[FATAL] Couldn't set the desired state for $step"
+        }
+    }
+}
+
+if ($LASTEXITCODE -eq 0) {
+    Write-Host "[PASS] All resources are in desired state" -ForegroundColor Green
+}
\ No newline at end of file
diff --git a/dsc/steps/ExtensionManifestV2Availability.dsc.yml b/dsc/steps/ExtensionManifestV2Availability.dsc.yml
new file mode 100644
index 0000000..8b2470b
--- /dev/null
+++ b/dsc/steps/ExtensionManifestV2Availability.dsc.yml
@@ -0,0 +1,9 @@
+$schema: https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/2023/08/config/document.json
+resources:
+  - name: Manifest V2 Availability
+    type: Microsoft.Windows/Registry
+    properties:
+      keyPath:   HKLM\SOFTWARE\Policies\Google\Chrome\
+      valueName: ExtensionManifestV2Availability
+      valueData:
+        DWord: 2
\ No newline at end of file
diff --git a/dsc/validate.dsc.yml b/dsc/validate.dsc.yml
new file mode 100644
index 0000000..c1b57aa
--- /dev/null
+++ b/dsc/validate.dsc.yml
@@ -0,0 +1,8 @@
+$schema: https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/2023/08/config/document.json
+
+resources:
+  - name: Validate the OS is Windows
+    type: Microsoft/OSInfo
+    properties:
+      family: Windows
+
diff --git a/excel/convert-xlsx-to-csv.ps1 b/excel/convert-xlsx-to-csv.ps1
index 2da3374..ec00332 100644
--- a/excel/convert-xlsx-to-csv.ps1
+++ b/excel/convert-xlsx-to-csv.ps1
@@ -50,6 +50,6 @@ $wsEmpty.Activate()
 1..2 | % { $wsEmpty.Rows(1).Delete() | Out-Null }
 
 # save file as csv
-$wsEmpty.SaveAs("$scriptPath\..\.test\excel.csv", 6)
+$wsEmpty.SaveAs("$scriptPath\..\.test\dist\excel.csv", 6)
 # close excel application
 $Excel.Quit()
\ No newline at end of file
diff --git a/file-processing/split kml.ps1 b/file-processing/split kml.ps1
new file mode 100644
index 0000000..512ea54
--- /dev/null
+++ b/file-processing/split kml.ps1	
@@ -0,0 +1,27 @@
+$kmlPath = 'C:\big.kml'
+$max = 240
+$partsFolder = "$PSScriptRoot\parts"
+
+[xml]$doc = Get-Content -Path $kmlPath
+mkdir $partsFolder -ErrorAction SilentlyContinue | Out-Null
+$i = 1
+do {
+    [xml]$clone = $doc.Clone()
+    $clone.ChildNodes[0].Encoding = $null
+
+    # remove everything except max number count (i.e 240, 480, 720)
+    $clone.kml.Document.Folder.Placemark | Select-Object -Skip ($max * $i) | % {
+        $clone.kml.Document.Folder.RemoveChild($_) | Out-Null
+    }
+
+    # buffering - selecting last max number count
+    while ($clone.kml.Document.Folder.Placemark.Count -gt $max) {
+        $clone.kml.Document.Folder.Placemark | Select-Object -First 1 | % {
+            $clone.kml.Document.Folder.RemoveChild($_) | Out-Null
+        }
+    }
+
+    $clone.Save("$partsFolder\_part2_$($i).kml")
+    $i++
+}
+while ($max * $i -le $doc.kml.Document.Folder.Placemark.Count)
\ No newline at end of file
diff --git a/filesystem/gzip.ps1 b/filesystem/gzip.ps1
new file mode 100644
index 0000000..d7063b2
--- /dev/null
+++ b/filesystem/gzip.ps1
@@ -0,0 +1,33 @@
+function ConvertFrom-Gzip {
+    Param (
+        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
+        [ValidateScript( { (Get-Item $_).Name.EndsWith(".gz") })]
+        [System.IO.FileInfo]
+        $InputObject,
+
+        [Parameter(Mandatory = $false)]
+        [switch]
+        $RemoveInputFile
+    )
+    Process {
+        # Create a new file and open a filestream for it
+        $NewFilename = $InputObject.FullName.Remove($InputObject.FullName.Length - $InputObject.Extension.Length)
+        $DecompressedFileStream = [System.IO.File]::Create($NewFilename)
+
+        # Open the compressed file and copy the file to the decompressed stream
+        $CompressedFileStream = $InputObject.OpenRead()
+        $GZipStream = [System.IO.Compression.GZipStream]::new($CompressedFileStream, [System.IO.Compression.CompressionMode]::Decompress)
+        $GZipStream.CopyTo($DecompressedFileStream)
+
+        # Cleanup
+        $DecompressedFileStream.Dispose()
+        $GZipStream.Dispose()
+        $CompressedFileStream.Dispose()
+        $DecompressedFileStream, $GZipStream, $CompressedFileStream = $null
+
+        # Remove the initial file if requested.
+        if ($PSBoundParameters.ContainsKey('RemoveInputFile')) {
+            $InputObject.Delete()
+        }
+    }
+}
\ No newline at end of file
diff --git a/filesystem/rename-files-lastwritetime.ps1 b/filesystem/rename-files-lastwritetime.ps1
new file mode 100644
index 0000000..68c3790
--- /dev/null
+++ b/filesystem/rename-files-lastwritetime.ps1
@@ -0,0 +1,5 @@
+Get-ChildItem "D:\___to backup\" | % {
+    $date = $_.LastWriteTime.ToString("yyyy-MM-dd")
+    $name = $_.Name
+    $_ | Rename-Item -NewName "$date-$name"
+}
\ No newline at end of file
diff --git a/git/add-submodule.ps1 b/git/add-submodule.ps1
new file mode 100644
index 0000000..853cfe8
--- /dev/null
+++ b/git/add-submodule.ps1
@@ -0,0 +1,3 @@
+# Add new submodule
+git submodule add git://github.com/jquery/jquery.git externals/jquery
+git submodule update --init --recursive
\ No newline at end of file
diff --git a/git/find-large-files.sh b/git/find-large-files.sh
new file mode 100644
index 0000000..347b7ca
--- /dev/null
+++ b/git/find-large-files.sh
@@ -0,0 +1,21 @@
+git rev-list --objects --all |
+  git cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' |
+  sed -n 's/^blob //p' |
+  awk '$2 >= 2^20' |
+  sort --numeric-sort --key=2 |
+  cut -c 1-12,41- |
+  $(command -v gnumfmt || echo numfmt) --field=2 --to=iec-i --suffix=B --padding=7 --round=nearest
+
+# example output
+# 22c19f287836  1.0MiB images/posts/1.gif
+# 0e15a02b835a  1.2MiB images/posts/2.gif
+# f48d3086bf1d  1.5MiB images/posts/3.gif
+# eecf2e1d46a7  1.6MiB images/posts/4.gif
+# a267f286e7f2  1.7MiB images/posts/5.gif
+# 225cba92676b  3.4MiB images/posts/6.gif
+
+# to find commits with SHA use
+# git log --raw --all --find-object=225cba92676b
+
+# to find all files with given extension
+# git log --all --full-history -- *.gif
\ No newline at end of file
diff --git a/git/git-snippets.ps1 b/git/git-snippets.ps1
new file mode 100644
index 0000000..168d02b
--- /dev/null
+++ b/git/git-snippets.ps1
@@ -0,0 +1,2 @@
+# create a new Git branch based on a specific commit SHA
+git checkout -b BRANCH_NAME COMMIT_SHA
\ No newline at end of file
diff --git a/git/github-api.ps1 b/git/github-api.ps1
new file mode 100644
index 0000000..8734b15
--- /dev/null
+++ b/git/github-api.ps1
@@ -0,0 +1,14 @@
+Clear-Host
+$PersonalAccessToken = "github_pat_[your_personal_access_token]"
+
+$GitHubApiUrl = "https://api.github.com/user/repos"
+# $GitHubApiUrl = "https://api.github.com/orgs/PowerShellLibrary/repos"
+# $GitHubApiUrl = "https://api.github.com/repositories"
+
+$Headers = @{
+    Authorization = "token $PersonalAccessToken"
+    "User-Agent"  = "PowerShell" # GitHub API requires a User-Agent header
+}
+
+$response = Invoke-RestMethod -Uri $GitHubApiUrl -Method Get -Headers $Headers
+$response
diff --git a/git/setup-ssh-for-git.ps1 b/git/setup-ssh-for-git.ps1
new file mode 100644
index 0000000..4e21da6
--- /dev/null
+++ b/git/setup-ssh-for-git.ps1
@@ -0,0 +1,34 @@
+# Prerequisites - you need to get SSH key supported by your git hosting service.
+# deploy it into: c:\id_rsa
+
+# generate SSH key
+ssh-keygen -t rsa -b 4096 -C "key-comment" # 4096 RSA key (SHA256)
+ssh-keygen -t ed25519 -C "key-comment"
+
+# install choco
+Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
+
+# install dependencies
+choco install git -y
+
+# deploy SSH key into keys store
+$userName = [Environment]::UserName
+Write-Host "Username: $userName" -ForegroundColor Green
+Get-Item c:\id_rsa | Copy-Item -Destination "C:\Users\$userName\.ssh\id_rsa"
+
+# enable ssh service
+Get-Service -Name ssh-agent | Set-Service -StartupType Manual
+Start-Service ssh-agent
+
+# register ssh key
+ssh-add "C:\Users\$userName\.ssh\id_rsa"
+
+# register known_hosts
+ssh-keyscan bitbucket.org >> "C:\Users\$userName\.ssh\known_hosts"
+ssh-keyscan github.com >> "C:\Users\$userName\.ssh\known_hosts"
+ssh-keyscan vs-ssh.visualstudio.com >> "C:\Users\$userName\.ssh\known_hosts"
+
+# test connection to git repositories
+ssh -T ssh://alan-null@vs-ssh.visualstudio.com
+ssh -T git@bitbucket.org
+ssh -T git@github.com
\ No newline at end of file
diff --git a/git/specify-user.ps1 b/git/specify-user.ps1
new file mode 100644
index 0000000..4bac4be
--- /dev/null
+++ b/git/specify-user.ps1
@@ -0,0 +1,3 @@
+## Specify user
+git config user.name "AuthorExample"
+git config user.email "ae@duck.com"
\ No newline at end of file
diff --git a/git/worktree.ps1 b/git/worktree.ps1
new file mode 100644
index 0000000..fa9e9f4
--- /dev/null
+++ b/git/worktree.ps1
@@ -0,0 +1,8 @@
+# list all worktrees
+git worktree list
+
+# add a worktree to folder _branch using branch 'issues/templates_enabled_flag'
+git worktree add _branch issues/templates_enabled_flag
+
+# remove a worktree from folder _branch
+git worktree remove _branch
diff --git a/good-practices/add-to-array.ps1 b/good-practices/add-to-array.ps1
new file mode 100644
index 0000000..00595cf
--- /dev/null
+++ b/good-practices/add-to-array.ps1
@@ -0,0 +1,17 @@
+# Adding to an array with += is much slower:
+
+$list = @()
+Measure-Command {
+    foreach ($number in $(1..10000)) {
+        $list += $number
+    }
+}
+
+# than capturing the output of the loop directly:
+
+Measure-Command {
+    $list = foreach ($number in $(1..10000)) {
+        $number
+    }
+}
+
diff --git a/good-practices/foreach-object.ps1 b/good-practices/foreach-object.ps1
new file mode 100644
index 0000000..c07fe8d
--- /dev/null
+++ b/good-practices/foreach-object.ps1
@@ -0,0 +1,9 @@
+# BAD
+@(1, 2, 3) | Foreach-Object {
+    # do stuff
+}
+
+# GOOD - 2x faster
+foreach ($i in @(1, 2, 3)) {
+    # do stuff
+}
\ No newline at end of file
diff --git a/good-practices/return.ps1 b/good-practices/return.ps1
new file mode 100644
index 0000000..aa812fb
--- /dev/null
+++ b/good-practices/return.ps1
@@ -0,0 +1,64 @@
+Clear-Host
+$tmpFile = 'd:\temp\tmp.mp4'
+
+function Get-Obj {
+    [byte[]]$payload = [System.IO.File]::ReadAllBytes($tmpFile)
+    $payload
+}
+
+function Get-Wrapped {
+    [byte[]]$payload = [System.IO.File]::ReadAllBytes($tmpFile)
+    @{ wrap = $payload }
+}
+
+function Get-Operator {
+    [byte[]]$payload = [System.IO.File]::ReadAllBytes($tmpFile)
+    ,$payload
+}
+
+function Get-WriteOutput {
+    [byte[]]$payload = [System.IO.File]::ReadAllBytes($tmpFile)
+    Write-Output $payload -NoEnumerate
+}
+
+Measure-Command {
+    [byte[]]$out1 = Get-Obj
+    Write-Host "Size: $($out1.Length)"
+}
+
+Measure-Command {
+    $out2 = Get-Wrapped
+    Write-Host "Size: $($out2.wrap.Length)"
+}
+
+Measure-Command {
+    $out3 = Get-Operator
+    Write-Host "Size: $($out3.Length)"
+}
+
+Measure-Command {
+    $out4 = Get-WriteOutput
+    Write-Host "Size: $($out4.Length)"
+}
+
+# OUTPUT for 6.5 MB file
+
+##### Get-Obj #####
+# Size: 6 439 243
+# TotalSeconds      : 2.4369009
+# TotalMilliseconds : 2436.9009
+
+##### Get-Wrapped #####
+# Size: 6 439 243
+# TotalSeconds      : 0.0087145
+# TotalMilliseconds : 8.7145
+
+##### Get-Operator #####
+# Size: 6 439 243
+# TotalSeconds      : 0.025268
+# TotalMilliseconds : 25.268
+
+##### Get-WriteOutput #####
+# Size: 6 439 243
+# TotalSeconds      : 0.0205171
+# TotalMilliseconds : 20.5171
\ No newline at end of file
diff --git a/good-practices/where-object.ps1 b/good-practices/where-object.ps1
new file mode 100644
index 0000000..4a6dd44
--- /dev/null
+++ b/good-practices/where-object.ps1
@@ -0,0 +1,11 @@
+# BAD
+$array = @(1, 2, 3, 1, 3, 4) | Where-Object { $_ -eq 1 }
+
+# GOOD - x17 faster
+$array = @(
+    foreach ($i in @(1, 2, 3, 1, 3, 4)) {
+        if ($i -eq 1) {
+            $i
+        }
+    }
+)
\ No newline at end of file
diff --git a/media/color-inversion.md b/media/color-inversion.md
new file mode 100644
index 0000000..927a9ce
--- /dev/null
+++ b/media/color-inversion.md
@@ -0,0 +1,43 @@
+# Color inversion with ffmpeg
+
+```powershell
+ffmpeg -i input.mp4 -vf "negate,hue=h=180,eq=contrast=1.2:saturation=1.1" output.mp4
+```
+## Demo
+#### Before
+
+<video width="820"  controls>
+  <source src="https://github.com/user-attachments/assets/a6969533-a1f9-4a8f-9203-dd151f4c6aa7" type="video/mp4">
+</video>
+
+<!-- to display video on GitHub Markdown -->
+https://github.com/user-attachments/assets/a6969533-a1f9-4a8f-9203-dd151f4c6aa7
+
+#### After
+
+<video width="820"  controls>
+  <source src="https://github.com/user-attachments/assets/16785da7-4ed3-48c5-ad3e-b1223987c49e" type="video/mp4">
+</video>
+
+<!-- to display video on GitHub Markdown -->
+https://github.com/user-attachments/assets/16785da7-4ed3-48c5-ad3e-b1223987c49e
+
+
+## Explanation
+The `-i input.mp4` part specifies the input file.
+
+The `-vf` flag stands for "video filter," and it is followed by a series of filters applied to the video.
+
+The filters are:
+
+- `negate`: This filter inverts the colors of the video, creating a negative effect.
+- `hue=h=180`: This filter adjusts the hue of the video by 180 degrees, effectively rotating the color wheel to change the overall color tone.
+- `eq=contrast=1.2:saturation=1.1`: This filter adjusts the contrast and saturation of the video. The contrast=1.2 increases the contrast by 20%, making the darks darker and the lights lighter. The saturation=1.1 increases the saturation by 10%, making the colors more vivid.
+
+
+
+Combining these filters results in a video with inverted colors, a shifted hue, and enhanced contrast and saturation. The processed video is then saved as output.mp4.
+
+
+*[source:
+Rubber Duck Thursdays!](https://www.youtube.com/watch?v=o7b6t6uZJPA)*
\ No newline at end of file
diff --git a/media/ffmpeg.ps1 b/media/ffmpeg.ps1
index 3e8de0a..898ab7c 100644
--- a/media/ffmpeg.ps1
+++ b/media/ffmpeg.ps1
@@ -1,4 +1,5 @@
 # https://ffmpeg.org/ffmpeg.html
+
 # Takes two files (audio, video) and combine them together into mp4 file.
 # As audio is shorter add offset to the video so it can sync with audio
 #
@@ -19,4 +20,46 @@ ffmpeg -y -itsoffset 0.2 -i v.webm -i a.mp4 -map 0:0 -map 1:0 -c copy oFilename.
 # -ar rate            set audio sampling rate (in Hz)
 # -ac channels        set number of audio channels
 # -ab bitrate         audio bitrate (please use -b:a)
-ffmpeg -i "$($_.FullName)" -vn -ar 44100 -ac 2 -b:a 192k "$($_.FullName.Replace('.wav','.mp3'))"
\ No newline at end of file
+ffmpeg -i "$($_.FullName)" -vn -ar 44100 -ac 2 -b:a 192k "$($_.FullName.Replace('.wav','.mp3'))"
+
+
+# Takes two files (audio, image) and combine them together into mp4 file.
+# -loop 1           - loop the input image infinitely (1 - loop, 0 - no loop)
+# -i img.jpg        - specifies an input file (image)
+# -i audio.mp3      - second input file (MP3 audio)
+# -c:v libx264      - specifies the video codec
+# -c:a aac          - specifies the audio codec. aac is a standard codec for MP4 files, offering good quality at lower bitrates.
+# -b:a 320k         - sets the audio bitrate
+# -shortest         - this option ensures that the output video will be as long as the shortest input.
+#  output.mp4       - name of the output video file
+ffmpeg -loop 1 -i img.jpg -i audio.mp3 -c:v libx264 -c:a aac -b:a 320k -shortest output.mp4
+
+
+# Crop video from the top
+# This command crops the video by removing 440 pixels from the top, effectively shifting the video down by that amount.
+# -i input.mp4                  - specifies the input video file
+# -vf "crop=iw:ih-440:0:440"    - applies a video filter (vf) to crop the video.
+#   - iw        Input width (keeps the full width of the video).
+#   - ih-440    Input height minus 440 pixels
+#   - 0         X offset (starts cropping from the left edge).
+#   - 440       Y offset (starts cropping from 440 pixels down from the top).
+# -c:a copy                     - copies the audio stream without re-encoding it
+# output.mp4                    - name of the output video file
+ffmpeg -i .\input.mp4 -vf "crop=iw:ih-440:0:440" -c:a copy output.mp4
+
+
+# Inspect media file streams
+# ffprobe prints detailed information about the input file, including
+# codec, format, bitrate, duration, and stream indexes (video, audio,
+# subtitles, etc.).
+ffprobe .\input.mp4
+
+
+# Extract a specific audio stream from a video file to MP3
+# -i input.mp4            - input file containing video and audio streams
+# -map 0:2                - select stream index 2 from input 0
+# -c:a libmp3lame         - use the LAME MP3 encoder for the audio stream
+# -q:a 2                  - set variable bitrate (VBR) audio quality level 2
+#                            (lower is better quality, typical range 0–9)
+# out0.mp3                - output MP3 file containing the selected audio stream
+ffmpeg -i .\input.mp4 -map 0:2 -c:a libmp3lame -q:a 2 out0.mp3
\ No newline at end of file
diff --git a/media/touch-image.ps1 b/media/touch-image.ps1
new file mode 100644
index 0000000..0b94ddc
--- /dev/null
+++ b/media/touch-image.ps1
@@ -0,0 +1,16 @@
+# Use case: modify media items without changing their visual content
+
+# Usage: touch all PNG files in the images directory
+# Get-ChildItem ".\themes\images\" -Filter *.png -Recurse | ForEach-Object { Touch-File $_.FullName }
+
+
+function Touch-File {
+    param ([string]$filePath)
+
+    $bytes = [System.IO.File]::ReadAllBytes($filePath)
+
+    # Append a harmless zero byte
+    $bytes += 0x00
+
+    [System.IO.File]::WriteAllBytes($filePath, $bytes)
+}
\ No newline at end of file
diff --git a/monitoring/procmon/ProcmonConfigurationObsidian.pmc b/monitoring/procmon/ProcmonConfigurationObsidian.pmc
new file mode 100644
index 0000000..26c162d
Binary files /dev/null and b/monitoring/procmon/ProcmonConfigurationObsidian.pmc differ
diff --git a/monitoring/procmon/procmon-cli.ps1 b/monitoring/procmon/procmon-cli.ps1
new file mode 100644
index 0000000..45b6612
--- /dev/null
+++ b/monitoring/procmon/procmon-cli.ps1
@@ -0,0 +1,17 @@
+# This script is used to start Process Monitor in the background with a specific configuration file.
+# https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
+
+procmon.exe /Quiet /Minimized /LoadConfig ProcmonConfigurationObsidian.pmc /Backingfile MonitorLog.pml
+
+# Configuration File: ProcmonConfigurationObsidian.pmc
+
+# Monitoring Activities
+#   Show Process and Thread Activity
+#   Show Network Activity
+
+# Capture Events (Drop filtered events)
+#   Filters
+#    - ✅Process Name is Obsidian.exe
+#    - ❌Operation is NOT Thread Create
+#    - ❌Operation is NOT Thread Exit
+#    - ❌Operation is NOT Load Image
\ No newline at end of file
diff --git a/security/local-https-dev-setup.ps1 b/security/local-https-dev-setup.ps1
new file mode 100644
index 0000000..44c7f1a
--- /dev/null
+++ b/security/local-https-dev-setup.ps1
@@ -0,0 +1,134 @@
+# ---------------------------------------------
+#   LOCAL HTTPS SETUP FOR DEVELOPMENT
+# ---------------------------------------------
+
+$ErrorActionPreference = "Stop"
+
+# --- CONFIG ---
+$dns = "localhost"
+$port = 19456
+$friendlyName = "Dev Local HTTPS Cert"
+
+$storeLocationRoot = "LocalMachine"
+$storeNameRoot = "Root"
+
+$storeLocationMy = "LocalMachine"
+$storeNameMy = "My"
+
+$prefix = "https://$dns`:$port/"
+
+Write-Host "=============================================="
+Write-Host "   HTTPS Setup for Local Secure Communication  "
+Write-Host "=============================================="
+Write-Host ""
+
+# Ensure administrator
+if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
+
+    Write-Host "[ERROR] This script must be run as Administrator." -ForegroundColor Red
+    exit 1
+}
+
+# ---------------------------------------------
+# Step 1 — Check/create certificate
+# ---------------------------------------------
+Write-Host "🔍 Checking for existing certificate..." -ForegroundColor Cyan
+
+$myStore = New-Object System.Security.Cryptography.X509Certificates.X509Store($storeNameMy, $storeLocationMy)
+$myStore.Open("ReadWrite")
+
+$existingCert = $myStore.Certificates | ? { $_.FriendlyName -eq $friendlyName }
+
+if ($existingCert) {
+    Write-Host "✔ Found existing certificate: $friendlyName" -ForegroundColor Green
+    $cert = $existingCert
+}
+else {
+    Write-Host "⏳ Creating new self-signed certificate for '$dns'..." -ForegroundColor Yellow
+
+    $cert = New-SelfSignedCertificate `
+        -DnsName $dns, "127.0.0.1" `
+        -FriendlyName $friendlyName `
+        -CertStoreLocation "Cert:\$storeLocationMy\$storeNameMy" `
+        -KeyExportPolicy Exportable `
+        -NotAfter (Get-Date).AddYears(5)
+
+    Write-Host "✔ Certificate created successfully!" -ForegroundColor Green
+}
+
+$myStore.Close()
+
+# ---------------------------------------------
+# Step 2 — Ensure certificate is trusted
+# ---------------------------------------------
+Write-Host ""
+Write-Host "🔐 Ensuring certificate is trusted..." -ForegroundColor Cyan
+
+$rootStore = New-Object System.Security.Cryptography.X509Certificates.X509Store($storeNameRoot, $storeLocationRoot)
+$rootStore.Open("ReadWrite")
+
+$alreadyInRoot = $rootStore.Certificates |
+Where-Object { $_.Thumbprint -eq $cert.Thumbprint }
+
+if ($alreadyInRoot) {
+    Write-Host "✔ Certificate already trusted (Root store)." -ForegroundColor Green
+}
+else {
+    Write-Host "⏳ Adding certificate to Trusted Root..." -ForegroundColor Yellow
+    $rootStore.Add($cert)
+    Write-Host "✔ Certificate trusted successfully!" -ForegroundColor Green
+}
+
+$rootStore.Close()
+
+# ---------------------------------------------
+# Step 3 — Clean old HTTPS bindings
+# ---------------------------------------------
+Write-Host ""
+Write-Host "🧹 Cleaning old HTTPS bindings on port $port..." -ForegroundColor Cyan
+
+try {
+    netsh http delete sslcert ipport=0.0.0.0:$port | Out-Null
+    Write-Host "✔ Old bindings removed." -ForegroundColor Green
+}
+catch {
+    Write-Host "ℹ No old bindings found." -ForegroundColor DarkGray
+}
+
+# ---------------------------------------------
+# Step 4 — Bind certificate to port
+# ---------------------------------------------
+Write-Host ""
+Write-Host "🔗 Binding certificate to port $port..." -ForegroundColor Cyan
+
+$thumb = $cert.Thumbprint
+$appid = [guid]::NewGuid()
+
+netsh http add sslcert ipport=0.0.0.0:$port certhash=$thumb certstorename=$storeNameMy appid="{$appid}" | Out-Null
+
+Write-Host "✔ HTTPS binding added successfully!" -ForegroundColor Green
+
+# ---------------------------------------------
+# Step 5 — Summary
+# ---------------------------------------------
+Write-Host ""
+Write-Host "=============================================="
+Write-Host "              SETUP COMPLETE 🎉"
+Write-Host "=============================================="
+Write-Host ""
+Write-Host "🔒 HTTPS is now enabled for your local server."
+Write-Host ""
+Write-Host "📜 Details:"
+Write-Host " - Hostname:   $dns"
+Write-Host " - Port:       $port"
+Write-Host " - Prefix:     $prefix"
+Write-Host " - Thumbprint: $thumb"
+Write-Host " - Cert Name:  $friendlyName"
+Write-Host ""
+Write-Host "🧪 Test it in your browser:"
+Write-Host "   $prefix" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "✔ Your Chrome extension should now work without certificate errors."
+Write-Host ""
+Write-Host "=============================================="
+Write-Host ""
diff --git a/sql/pihole/adlist-unique-domains.sql b/sql/pihole/adlist-unique-domains.sql
new file mode 100644
index 0000000..8a8b4f7
--- /dev/null
+++ b/sql/pihole/adlist-unique-domains.sql
@@ -0,0 +1,25 @@
+-- This SQL query retrieves the number of unique domains and total domains for each adlist from the vw_gravity view.
+-- It calculates the uniqueness percentage and orders the results by this percentage in ascending order.
+
+SELECT
+    adlist_id,
+    COUNT(DISTINCT domain) AS unique_domains,
+    COUNT(domain) AS total_domains,
+    ROUND(CAST(COUNT(DISTINCT domain) AS FLOAT) / COUNT(domain) * 100, 2) AS uniqueness_percent
+FROM
+    vw_gravity
+GROUP BY
+    adlist_id
+ORDER BY
+    uniqueness_percent ASC;
+
+
+-- Example output:
+-- adlist_id	unique_domains	total_domains	uniqueness_percent
+-- 7	        30873	        31461	        98.13
+-- 6	        42363	        42536	        99.59
+-- 1	        106610	        106611	        100.0
+-- 2	        2194	        2194	        100.0
+-- 3	        162079	        162079	        100.0
+-- 4	        319548	        319548	        100.0
+-- 5	        307383	        307383	        100.0
\ No newline at end of file
diff --git a/sql/pihole/globally-unique-domains.sql b/sql/pihole/globally-unique-domains.sql
new file mode 100644
index 0000000..060fe39
--- /dev/null
+++ b/sql/pihole/globally-unique-domains.sql
@@ -0,0 +1,28 @@
+-- This SQL query calculates the percentage of globally unique domains in each adlist from the vw_gravity view.
+-- Run trim-domain.sql before executing this query to ensure that the domain field is clean and trimmed.
+SELECT
+    g1.adlist_id,
+    COUNT(*) AS total_domains,
+    SUM(CASE WHEN dup_counts.domain_count = 1 THEN 1 ELSE 0 END) AS globally_unique_domains,
+    ROUND(SUM(CASE WHEN dup_counts.domain_count = 1 THEN 1.0 ELSE 0 END) / COUNT(*) * 100, 2) AS uniqueness_percent
+FROM
+    vw_gravity g1
+JOIN (
+    SELECT domain, COUNT(DISTINCT adlist_id) AS domain_count
+    FROM vw_gravity
+    GROUP BY domain
+) dup_counts ON g1.domain = dup_counts.domain
+GROUP BY
+    g1.adlist_id
+ORDER BY
+    uniqueness_percent DESC;
+
+-- Example output:
+-- adlist_id	total_domains	globally_unique_domains	uniqueness_percent
+-- 4	        319548	        319548	                100.0
+-- 2	        2194	        2194	                100.0
+-- 7	        31461	        29665	                94.29
+-- 1	        106611	        100485	                94.25
+-- 6	        42536	        38253	                89.93
+-- 5	        307383	        249377	                81.13
+-- 3	        162079	        96220	                59.37
\ No newline at end of file
diff --git a/sql/pihole/trim-domain.sql b/sql/pihole/trim-domain.sql
new file mode 100644
index 0000000..1c66bb1
--- /dev/null
+++ b/sql/pihole/trim-domain.sql
@@ -0,0 +1,6 @@
+-- Trim leading and trailing characters from the domain field in the gravity table
+UPDATE gravity
+SET domain = TRIM(
+                TRIM(SUBSTR(domain, CASE WHEN domain LIKE '||%' THEN 3 ELSE 1 END), '^')
+            )
+WHERE adlist_id = 26;
\ No newline at end of file
diff --git a/strings/remove-non-ASCII-characters.ps1 b/strings/remove-non-ASCII-characters.ps1
new file mode 100644
index 0000000..6397047
--- /dev/null
+++ b/strings/remove-non-ASCII-characters.ps1
@@ -0,0 +1,2 @@
+$inputString = "żółć gęślą jaźń"
+[Text.Encoding]::ASCII.GetString([Text.Encoding]::GetEncoding("Cyrillic").GetBytes($inputString))
\ No newline at end of file
diff --git a/system-maintenance/create-file-snapshot.ps1 b/system-maintenance/create-file-snapshot.ps1
index c809a0b..baeb5f4 100644
--- a/system-maintenance/create-file-snapshot.ps1
+++ b/system-maintenance/create-file-snapshot.ps1
@@ -20,6 +20,9 @@ try {
         git commit -m "$date"
     }
 }
+catch{
+    Write-Error $_.Exception
+}
 finally {
     Set-Location $current
 }
diff --git a/system-setup/disable-connected-devices-platform-services.ps1 b/system-setup/disable-connected-devices-platform-services.ps1
new file mode 100644
index 0000000..f9d5144
--- /dev/null
+++ b/system-setup/disable-connected-devices-platform-services.ps1
@@ -0,0 +1,51 @@
+# Potential problems:
+# WON'T WORK
+# - timeline WIN+TAB
+# MIGHT NOT WORK
+# - clipboard history sharing between devices
+# - Bluetooth file sharing
+# - Windows Night Light
+
+Clear-Host
+$Error.Clear()
+
+function Disable-CDPUserSvcViaRegistry {
+    $baseRegistryPath = "HKLM:\SYSTEM\CurrentControlSet\Services"
+    $cdpServices = Get-ChildItem -Path $baseRegistryPath | Where-Object { $_.Name -match "CDPUserSvc" }
+
+    foreach ($service in $cdpServices) {
+        Write-Host "Processing service: $($service.PSChildName)" -ForegroundColor Yellow
+        try {
+            # Set the 'Start' value to 4 (Disabled) at the root of the service key
+            Set-ItemProperty -Path $service.PSPath -Name "Start" -Value 4 -ErrorAction Stop
+            Write-Host "`tSuccessfully disabled service: $($service.PSChildName)" -ForegroundColor Green
+        }
+        catch {
+            Write-Host "`tFailed to modify service: $($service.PSChildName). Error: $($_.Exception.Message)" -ForegroundColor Red
+        }
+    }
+}
+
+# Disable and stop CDPUserSvc
+Get-Service -Name 'CDPUserSvc*' | ForEach-Object {
+    Stop-Service -Name $_.Name -Force
+    try {
+        Set-Service -Name $_.Name -StartupType Disabled -ErrorAction Stop
+    }
+    catch  [Microsoft.PowerShell.Commands.ServiceCommandException] {
+        Disable-CDPUserSvcViaRegistry
+    }
+}
+
+# Disable and stop CDPSvc
+Write-Host "Processing service: CDPSvc" -ForegroundColor Yellow
+Stop-Service -Name CDPSvc -Force
+
+try {
+    Set-Service -Name CDPSvc -StartupType Disabled
+    Write-Host "`tSuccessfully disabled service: CDPSvc" -ForegroundColor Green
+
+}
+catch  [Microsoft.PowerShell.Commands.ServiceCommandException] {
+    write-host "`tFailed to modify service: CDPSvc. Error: $($_.Exception.Message)" -ForegroundColor Red
+}
\ No newline at end of file
diff --git a/system-setup/firewall-rules.ps1 b/system-setup/firewall-rules.ps1
new file mode 100644
index 0000000..9660b8f
--- /dev/null
+++ b/system-setup/firewall-rules.ps1
@@ -0,0 +1,17 @@
+# Block a ABCD.exe from accessing the Internet using Windows Defender Firewall
+$exePath = "C:\Users\Alan\AppData\Local\Programs\ABCD\ABCD.exe"
+
+# Add outbound rule to block ABCD.exe
+New-NetFirewallRule -DisplayName "[Block] ABCD Out" -Direction Outbound -Program $exePath -Action Block
+
+# Add inbound rule to block ABCD.exe
+New-NetFirewallRule -DisplayName "[Block] ABCD In" -Direction Inbound -Program $exePath -Action Block
+
+# Enable rules
+Get-NetFirewallRule -DisplayName "[Block] ABCD" | Set-NetFirewallRule -Enabled True
+
+# Disable the inbound rule
+Get-NetFirewallRule -DisplayName "*Block* ABCD In" | Set-NetFirewallRule -Enabled False
+
+#  Remove rules
+Get-NetFirewallRule -DisplayName '*ABCD*' | Remove-NetFirewallRule
\ No newline at end of file
diff --git a/system-setup/set-env-PATH.ps1 b/system-setup/set-env-PATH.ps1
new file mode 100644
index 0000000..1a3d9e0
--- /dev/null
+++ b/system-setup/set-env-PATH.ps1
@@ -0,0 +1,4 @@
+# This script will add a tool folder path to the system environment variable (PATH)
+$tool = "C:\tools\dsc"
+$PATH = [Environment]::GetEnvironmentVariable("PATH")
+[Environment]::SetEnvironmentVariable("PATH", "$PATH;$tool", [System.EnvironmentVariableTarget]::Machine)
\ No newline at end of file
diff --git a/tasks/register-scheduled-task.ps1 b/tasks/register-scheduled-task.ps1
new file mode 100644
index 0000000..8c4db3d
--- /dev/null
+++ b/tasks/register-scheduled-task.ps1
@@ -0,0 +1,21 @@
+$name = [guid]::NewGuid()
+$trigger = New-ScheduledTaskTrigger -Once -At 9am
+$principal = New-ScheduledTaskPrincipal -UserID "NT AUTHORITY\SYSTEM" -LogonType ServiceAccount -RunLevel Highest
+
+# inline script
+$action = New-ScheduledTaskAction -Execute 'Powershell.exe' -Argument '-NoProfile -WindowStyle Hidden -command "& { Write-Host 1 }"'
+# file script
+$action = New-ScheduledTaskAction -Execute 'Powershell.exe' -Argument '-NoLogo -WindowStyle hidden -file C:\script.ps1'
+
+$task = Register-ScheduledTask `
+    -TaskName $name `
+    -Description "Background task" `
+    -Trigger $trigger `
+    -Action $action `
+    -TaskPath '\Alan\jobs' `
+    -Principal $principal
+
+Write-Host "Created: $($task.TaskName) under $($task.TaskPath)"
+
+# display tasks in folder
+Get-ScheduledTask -TaskPath "\Alan\*"
\ No newline at end of file
diff --git a/windows/identify-motherboard.ps1 b/windows/identify-motherboard.ps1
new file mode 100644
index 0000000..17a4321
--- /dev/null
+++ b/windows/identify-motherboard.ps1
@@ -0,0 +1 @@
+wmic baseboard get product, Manufacturer, version, serialnumber
\ No newline at end of file
diff --git a/windows/ui interaction with powershell.ps1 b/windows/ui interaction with powershell.ps1
new file mode 100644
index 0000000..2ead253
--- /dev/null
+++ b/windows/ui interaction with powershell.ps1	
@@ -0,0 +1,13 @@
+# Focus Assist Off
+Add-Type -AssemblyName System.Windows.Forms
+[System.Windows.Forms.SendKeys]::SendWait("(^{ESC})")
+Start-Sleep -Milliseconds 500
+[System.Windows.Forms.SendKeys]::SendWait("(Focus Assist)")
+Start-Sleep -Milliseconds 200
+[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
+Start-Sleep -Milliseconds 700
+[System.Windows.Forms.SendKeys]::SendWait("{TAB}{TAB} ")
+Start-Sleep -Milliseconds 500
+[System.Windows.Forms.SendKeys]::SendWait("{ENTER}")
+Start-Sleep -Milliseconds 500
+[System.Windows.Forms.SendKeys]::SendWait("(%{F4})")
\ No newline at end of file
diff --git a/wsl/install-pwsh.sh b/wsl/install-pwsh.sh
new file mode 100644
index 0000000..b33e0d4
--- /dev/null
+++ b/wsl/install-pwsh.sh
@@ -0,0 +1,22 @@
+# Source: https://learn.microsoft.com/en-us/powershell/scripting/install/install-debian?view=powershell-7.5
+
+# Update the list of packages
+sudo apt-get update
+
+# Install pre-requisite packages.
+sudo apt-get install -y wget
+
+# Download the PowerShell package file
+wget https://github.com/PowerShell/PowerShell/releases/download/v7.5.0/powershell_7.5.0-1.deb_amd64.deb
+
+# Install the PowerShell package
+sudo dpkg -i powershell_7.5.0-1.deb_amd64.deb
+
+# Resolve missing dependencies and finish the install (if necessary)
+sudo apt-get install -f
+
+# Delete the downloaded package file
+rm powershell_7.5.0-1.deb_amd64.deb
+
+# Start PowerShell
+pwsh
\ No newline at end of file
diff --git a/wsl/refresh-debian.ps1 b/wsl/refresh-debian.ps1
new file mode 100644
index 0000000..3cb0449
--- /dev/null
+++ b/wsl/refresh-debian.ps1
@@ -0,0 +1,6 @@
+# Refresh Debian WSL distribution by unregistering and reinstalling it.
+# This is useful when the distribution is corrupted or when you want to reset it.
+
+wsl -l -v
+wsl --unregister Debian
+wsl --install -d Debian
\ No newline at end of file