Check Firmware-embedded Activation Key

To determine if the computer has a firmware-embedded activation key, type the following command at an elevated Windows PowerShell prompt:

(Get-CimInstance -query ‘select * from SoftwareLicensingService’).OA3xOriginalProductKey

Here is the command that you can use in an elevated Windows Command Line prompt:

wmic path softwareLicensingService get OA3xOriginalProductKey

If the device has a firmware-embedded activation key, it will be displayed in the output. If the output is blank, the device does not have a firmware embedded activation key. Or you may have typed the command incorrectly, double check syntax. Most OEM-provided devices designed to run Windows 8 or later will have a firmware-embedded key.

You can assign the license to Windows via the command line with this command:

slmgr /ipk win_license_key_here