Hello everyone. Weird problem: I recently built a computer (finally) but as my old computer worked not that good, I didn't want to burn the Windows 7 disk from it. This last Spring term, I was given product keys for Windows 7 and 8. I asked my friend for a copy of a Windows 7 upgrade (Vista to 7 Home Premium upgrade) disk. It seems to me, the disk only supports Home Premium for some reason, because when I enter the college's key, it doesn't want to work. I want to run Windows 7 as default (then upgrade to Windows 10) and Windows 7 with my old laptop's key and Windows 8.1 in a VM. So, it's simple: I can't upgrade, I can't enter the number, I'm doomed. Or not? What do you guys (and gals if any) say about this?