Validating windows 7
It’s an OEM copy, which means it can only be used on that computer.
Even if you purchase a retail, boxed copy of Windows and install it, that copy of Windows will become tied to your hardware after it activates itself with Microsoft.
This will depend on whether you have an OEM or retail copy of Windows installed on your computer. For example, if your computer is non-genuine because you’ve attempted to move a hard drive containing an OEM copy of Windows to an entirely new computer, Microsoft won’t help you make that copy of Windows genuine again.
Even if you have a retail copy, you’ll want to ensure it’s only installed on one computer at a time.
If you change your hardware later, your copy of Windows may become “non-genuine,” turn your desktop background black, and start pestering you to use a genuine version of Windows.