Easy question but I can't seem to find a definitive answer. My factory-Vista-installed laptop has been having some crazy issues, so I decided to do a fresh OS install. I didn't have the Vista disc, but I did have the 64-bit Windows 7 Home Premium disc that I used to install Windows 7 on my desktop last year.
So I installed Windows 7 on the laptop but obviously didn't register it since the only key i have is tied to my desktop, so I'm running in "demo" mode or whatever you'd like to call it.
I've got the laptop issues sorted out now and even have a lot of stuff set up on the laptop now just testing different things to make sure it wasn't going to crash on me. Now that I have all this stuff setup, I need to buy Windows 7 so that I have a legit product key to register the copy on the laptop. Question is, can I just buy a copy of Windows 7 and use the product key without reinstalling Windows 7? Will any product key work with any disc, or is it somehow tied to the disc and I'll be forced to do a fresh OS install?
Thanks a ton for any help.