Initial commit for powershell scripts.

Remove-DotNetCore31.ps1

@@ -0,0 +1,71 @@
+# Remove-DotNetCore31.ps1
+# Removes unsupported Microsoft .NET Core / ASP.NET Core / Windows Desktop Runtime / SDK 3.1.x components
+
+$ErrorActionPreference = "Continue"
+
+Write-Output "Starting .NET Core 3.1 remediation..."
+
+$registryPaths = @(
+    "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*",
+    "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
+)
+
+$targetApps = foreach ($path in $registryPaths) {
+    Get-ItemProperty $path -ErrorAction SilentlyContinue | Where-Object {
+        (
+            $_.DisplayName -match "Microsoft \.NET.*3\.1\." -or
+            $_.DisplayName -match "Microsoft ASP\.NET Core.*3\.1\." -or
+            $_.DisplayName -match "Microsoft Windows Desktop Runtime.*3\.1\."
+        ) -and
+        $_.UninstallString
+    }
+}
+
+if (-not $targetApps) {
+    Write-Output "No .NET Core 3.1 components found. Nothing to remove."
+    exit 0
+}
+
+foreach ($app in $targetApps) {
+    Write-Output "Found: $($app.DisplayName) $($app.DisplayVersion)"
+}
+
+foreach ($app in $targetApps) {
+    Write-Output "Attempting to remove: $($app.DisplayName) $($app.DisplayVersion)"
+
+    $uninstallString = $app.UninstallString
+
+    if ($uninstallString -match "\{[A-Fa-f0-9\-]{36}\}") {
+        $productCode = $Matches[0]
+        Write-Output "Using MSI product code: $productCode"
+        Start-Process -FilePath "msiexec.exe" -ArgumentList "/x $productCode /qn /norestart" -Wait
+    }
+    else {
+        Write-Output "No MSI product code found for $($app.DisplayName). Skipping."
+    }
+}
+
+Write-Output "Verifying remaining .NET Core 3.1 components..."
+
+$remainingApps = foreach ($path in $registryPaths) {
+    Get-ItemProperty $path -ErrorAction SilentlyContinue | Where-Object {
+        (
+            $_.DisplayName -match "Microsoft \.NET.*3\.1\." -or
+            $_.DisplayName -match "Microsoft ASP\.NET Core.*3\.1\." -or
+            $_.DisplayName -match "Microsoft Windows Desktop Runtime.*3\.1\."
+        ) -and
+        $_.UninstallString
+    }
+}
+
+if ($remainingApps) {
+    Write-Output "Some .NET Core 3.1 components may still remain:"
+    $remainingApps | ForEach-Object {
+        Write-Output "$($_.DisplayName) $($_.DisplayVersion)"
+    }
+    exit 1
+}
+else {
+    Write-Output ".NET Core 3.1 components removed successfully."
+    exit 0
+}