I'm thinking of building a PC and I'm wondering if I can use my all ready installed and activated copy of 7 Home Premium on this new build. It would be installed on the same hard drive it is now. So basically a reinstall on the same hard drive but with all new hardware. I got the disc when I purchased an HP desktop with Vista. They mailed me the 7 disc, which other than the HP branding on the label, seems like it would be the same as a retail copy.
Otherwise I guess I'll have to buy an OEM copy of 7 for the new build I guess.