Remove installed Windows Updates

This powershell snippet will search for all installed Windows updates and uninstall them one at a time.

$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$Criteria = "IsInstalled=1 and Type='Software'"
$Updates = $Searcher.Search($Criteria).Updates
$Updates | ForEach-Object {
    $_.IsHidden = $true
    $_.AcceptEula()
    $Installer = $_.Installer
    $Installer.Uninstall()
}

This powershell code will list all installed updates and allow you to select one or multiple updates to uninstall.

$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$Criteria = "IsInstalled=1 and Type='Software'"
$Updates = $Searcher.Search($Criteria).Updates

Write-Host "Installed updates:"
$Updates | ForEach-Object {
    Write-Host "$($_.Title) ($($_.Categories[0].Name)) - $($_.Date)"
}

$Selection = Read-Host "Enter the KB number of the update you want to uninstall (comma-separated for multiple updates):"
$KBs = $Selection.Split(",")

$Updates | Where-Object { $KBs -contains $_.Identity.UpdateID } | ForEach-Object {
    $_.IsHidden = $true
    $_.AcceptEula()
    $Installer = $_.Installer
    $Installer.Uninstall()
}