Initial commit for powershell scripts.

Remove-ClassicTeams.ps1

@@ -0,0 +1,131 @@
+# Remove-ClassicTeams.ps1
+# Removes classic Microsoft Teams and Teams Machine-Wide Installer.
+# Leaves new Teams / MSTeams MSIX app installed.
+
+$ErrorActionPreference = "Continue"
+
+Write-Output "Starting classic Teams cleanup..."
+
+# Stop Teams-related processes
+$processNames = @(
+    "Teams",
+    "ms-teams",
+    "msteams",
+    "Microsoft.Teams",
+    "Update"
+)
+
+foreach ($process in $processNames) {
+    Get-Process -Name $process -ErrorAction SilentlyContinue |
+        Stop-Process -Force -ErrorAction SilentlyContinue
+}
+
+Start-Sleep -Seconds 5
+
+# Remove Teams Machine-Wide Installer from HKLM uninstall registry
+$uninstallPaths = @(
+    "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*",
+    "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*"
+)
+
+$machineWideInstallers = foreach ($path in $uninstallPaths) {
+    Get-ItemProperty $path -ErrorAction SilentlyContinue | Where-Object {
+        $_.DisplayName -eq "Teams Machine-Wide Installer"
+    }
+}
+
+foreach ($app in $machineWideInstallers) {
+    Write-Output "Found Teams Machine-Wide Installer: $($app.DisplayName) $($app.DisplayVersion)"
+
+    if ($app.UninstallString -match "\{[A-Fa-f0-9\-]{36}\}") {
+        $productCode = $Matches[0]
+        Write-Output "Removing Teams Machine-Wide Installer using MSI product code: $productCode"
+        Start-Process -FilePath "msiexec.exe" -ArgumentList "/x $productCode /qn /norestart" -Wait
+    }
+    elseif ($app.UninstallString) {
+        Write-Output "Attempting uninstall using uninstall string: $($app.UninstallString)"
+        Start-Process -FilePath "cmd.exe" -ArgumentList "/c $($app.UninstallString) /quiet /norestart" -Wait
+    }
+}
+
+# Remove classic Teams per-user installs
+$userProfiles = Get-ChildItem "C:\Users" -Directory -ErrorAction SilentlyContinue | Where-Object {
+    $_.Name -notin @(
+        "Public",
+        "Default",
+        "Default User",
+        "All Users",
+        "defaultuser0"
+    )
+}
+
+foreach ($profile in $userProfiles) {
+    $teamsFolder = Join-Path $profile.FullName "AppData\Local\Microsoft\Teams"
+    $updateExe = Join-Path $teamsFolder "Update.exe"
+
+    if (Test-Path $updateExe) {
+        Write-Output "Uninstalling classic Teams for profile: $($profile.Name)"
+        Start-Process -FilePath $updateExe -ArgumentList "--uninstall -s" -Wait -ErrorAction SilentlyContinue
+        Start-Sleep -Seconds 3
+    }
+
+    if (Test-Path $teamsFolder) {
+        Write-Output "Removing remaining classic Teams folder for profile: $($profile.Name)"
+        Remove-Item -Path $teamsFolder -Recurse -Force -ErrorAction SilentlyContinue
+    }
+}
+
+# Remove common classic Teams leftovers
+$leftoverPaths = @(
+    "$env:ProgramData\Microsoft\Teams",
+    "$env:ProgramData\Microsoft\TeamsMachineInstaller"
+)
+
+foreach ($path in $leftoverPaths) {
+    if (Test-Path $path) {
+        Write-Output "Removing leftover path: $path"
+        Remove-Item -Path $path -Recurse -Force -ErrorAction SilentlyContinue
+    }
+}
+
+# Confirm new Teams remains installed
+$newTeams = Get-AppxPackage -AllUsers | Where-Object {
+    $_.Name -eq "MSTeams"
+}
+
+if ($newTeams) {
+    Write-Output "New Teams detected and left installed:"
+    $newTeams | Select-Object Name, Version, PackageFullName | Format-List | Out-String | Write-Output
+}
+else {
+    Write-Output "WARNING: New Teams / MSTeams was not detected after cleanup."
+}
+
+# Final verification for classic Teams entries
+$remainingMachineWide = foreach ($path in $uninstallPaths) {
+    Get-ItemProperty $path -ErrorAction SilentlyContinue | Where-Object {
+        $_.DisplayName -eq "Teams Machine-Wide Installer"
+    }
+}
+
+$remainingClassicFolders = foreach ($profile in $userProfiles) {
+    $teamsFolder = Join-Path $profile.FullName "AppData\Local\Microsoft\Teams"
+    if (Test-Path $teamsFolder) {
+        $teamsFolder
+    }
+}
+
+if ($remainingMachineWide -or $remainingClassicFolders) {
+    Write-Output "Classic Teams cleanup completed, but some remnants may remain."
+    if ($remainingMachineWide) {
+        $remainingMachineWide | Select-Object DisplayName, DisplayVersion | Format-Table | Out-String | Write-Output
+    }
+    if ($remainingClassicFolders) {
+        $remainingClassicFolders | ForEach-Object { Write-Output "Remaining folder: $_" }
+    }
+    exit 1
+}
+else {
+    Write-Output "Classic Teams and Teams Machine-Wide Installer cleanup completed successfully."
+    exit 0
+}