Windows 10 Subscription Activation via Powershell

Pat O'Neil 

Your if statement appears to be missing an evaluation.  As you have it originally you have this

if($ProductKey)

So in effect, to quote, "if Product Key what?".  What do you want product key to be?  I would say you want the script block below to run if the product key is not null/emtpy, correct?  So something like this might work

$ProductKey = (Get-CimInstance -ClassName SoftwareLicensingService).OA3xOriginalProductKey

if ($null -ne $ProductKey)

{
start-process c:\Windows\System32\changePK.exe -ArgumentList "/ProductKey $ProductKey"
}