New Post: Mouse and Keyboard disabled during installation

If ($Battery -like "False")
{
function Lock-Screen([ScriptBlock] $Payload={Start-Sleep -Seconds 5}, $Title='Busy, go away.')
{
    try
    {
      $window = New-Object Windows.Window
      $label = New-Object Windows.Controls.Label

      $label.Content = $Title
      $label.FontSize = 50
      $label.FontFamily = 'Consolas'
      $label.Background = 'Transparent'
      $label.Foreground = 'Red'
      $label.HorizontalAlignment = 'Center'
      $label.VerticalAlignment = 'Center'

      $Window.AllowsTransparency = $True
      $Window.Opacity = .7
      $window.WindowStyle = 'None'
      $window.Content = $label
      $window.Left = $window.Top = 0
      $window.WindowState = 'Maximized'
      $window.Topmost = $true

      $null = $window.Show()
      Invoke-Command -ScriptBlock $Payload
    }
    finally { $window.Close() }
}

$job = 
{ 
  Execute-Process -FilePath "manage-bde" -Arguments "-protectors -disable C:" -WindowStyle Hidden
  sleep 10
  Execute-Process -FilePath "WINUPTP.EXE" -Arguments "/S"
}

Lock-Screen -Payload $job -Title 'ACHTUNG!!! BIOS Update läuft daher NICHT ABSCHALTEN!' 
}
ELSE
{
Show-DialogBox -Title "---> BIOS UPDATE - WICHTIG INFO - BITTE LESEN <---" -Text "ACHTUNG: Das BIOS Update konnte nicht ausgeführt werden da der PC nicht am STROMNETZ angeschlossen ist! Bitte am STROMNETZ anschließen und das BIOS Update erneut starten!!!" -Icon "Exclamation" -TimeOut 600
Exit-Script -ExitCode "1618"
}