$hotfixes = Get-WmiObject -Class Win32_QuickFixEngineering | select hotfixid

foreach($hotfix in $hotfixes)
{
    $KBNummer = $hotfix.HotfixId.Replace("KB", "")
    $Kommando = "wusa.exe /uninstall /kb:$KBNummer /quiet /log /norestart"
    Write-Host ("Removing update with command: " + $Kommando)
    Invoke-Expression $Kommando
    While (@(Get-Process wusa -ErrorAction SilentlyContinue).Count -ne 0)
    {
        Start-Sleep 1
        Write-Host "Waiting for update removal to finish ..."
    }
}