I bought a Lenova laptop that came loaded with Win 7 with no recovery disk. I purchased the computer from an Amazon retailer. It included a Win 8 disk--I'd rather not use Win 8. I made a revovery disk of the Win 7 from the laptop. Can I use that same Win 7 recovery disk to also load Win 7 onto my HD desktop computer? And no, I don't have a key code.