popup - Can I display a messagebox before the logon (gpo startup script)?

Question

I have a powershell script in a GPO that runs on computer startup. This script takes a long time to uninstall and install a program, so I'm worried that some impatient user will shut down the machine during installation. I would like to pop up a message during installation, but it seems that the messagebox does not work before logon.

Add-Type -AssemblyName PresentationCore,PresentationFramework
$ButtonType = [System.Windows.MessageBoxButton]::Ok
$MessageboxTitle = “Avviso Importante”
$Messageboxbody = “Sto aggiornando. Non spegnere il computer fino al completamento dell'operazione!!!”
$MessageIcon = [System.Windows.MessageBoxImage]::Warning
[System.Windows.MessageBox]::Show($Messageboxbody,$MessageboxTitle,$ButtonType,$messageicon)

Thanks

Answer 1

等待大神解答