Activating Windows with PowerShell
You want to activate Windows using PowerShell? Here you go:
$computer = gc env:computername
$key = "XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
$service = get-wmiObject -query "select * from SoftwareLicensingService" -computername $computer
$service.InstallProductKey($key)
$service.RefreshLicenseStatus()
Note: $key will be followed by your legally obtained product key :)