On commercial OEM systems in the United States, the Windows product key is hardcoded into the UEFI Bios via Secure Boot. This allows for mass-deployment of Windows 10 in an enterprise environment. Check out NTLite for pushing custom drivers and other things.
Mike
Mike
@skysummer If its legal or not is questionable because I do not know your circumstance. If you have a VLK agreement or a number of OEM machines you should contact Microsoft about licensing parameters.