Remove Pc from AD via PowerShell
Local
Remove-Computer -UnjoinDomaincredential DOMÄNE\BENUTZER -PassThru -Verbose -Restart
DC server
Remove-ADComputer -Identity COMPUTERNAME
Remove-Computer -UnjoinDomaincredential DOMÄNE\BENUTZER -PassThru -Verbose -Restart
Remove-ADComputer -Identity COMPUTERNAME