Activating windows via powershell

hi, trying activate windows via powershell , have found script:

https://social.technet.microsoft.com/forums/office/en-us/9fcdb039-f9f0-48a9-8253-1f52c0257a80/activate-windows-using-powershell?forum=winservergen

problem is, cannot run it. exact version of script:

##### getting serial key bios #### $key = (wmic path softwarelicensingservice oa3xoriginalproductkey)[2];break  # getting activation object#  $service = get-wmiobject -query 'select * softwarelicensingservice'  ##### install product key , activate #### $service.installproductkey($key) $service.refreshlicensestatus()

i tried create $key parameter manually this 

$key = "xxx-xxx-xxx-xxx";break

i tried both variations without break

my problem line:

$service.installproductkey($key)

it gives me following error:

exception calling "installproductkey" : "" @ line:1 char:1 + $service.installproductkey($key) + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~     + categoryinfo          : notspecified: (:) [], methodinvocationexception     + fullyqualifiederrorid : wmimethodexception  

if try echo $key file, or write $key in powershell seems contains key , newline. 

i suspect new line problem here, scripts works if manually insert key this:

# getting activation object# $service = get-wmiobject -query 'select * softwarelicensingservice'  ##### install product key , activate #### $service.installproductkey("xxx-xxx-xxx-xxx") $service.refreshlicensestatus()

first sort out doing , use correct code:

$service = get-wmiobject -query 'select * softwarelicensingservice' $service.oa3xoriginalproductkey $key=$service.oa3xoriginalproductkey $service.installproductkey($key)

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\_(ツ)_/

Windows Server  >  Windows PowerShell