Gets the product key stored in UEFI/BIOS and import it.

Set-WindowsOemProductKey.ps1

<#
    .SYNOPSIS
    Reads the Windows (OEM) product key from firmware (UEFI/BIOS), then imports it via slmgr.    
    
    .NOTES
    "There are many like it, but this one is mine." 
    Author: Niels Scheffers <niels.scheffers@etesian.nl>    
    Last modified: 2022-03-10  

#>
Try {  
    # Get OEM product key from firmware. 
    $oemProductKey = (Get-WmiObject -Query 'SELECT * FROM SoftwareLicensingService').OA3xOriginalProductKey;    
    # Import the key.
    Invoke-Command -ScriptBlock { slmgr -ipk $oemProductKey; }
} 
Catch {
    Throw "Failed to set Windows product key.";
}