So I'm trying to upgrade to Windows 7 64-bit. I boot it up, do the clean install, works like a charm for a while, restarts a couple times. And then it just goes blank when the username screen should load up. I've tried repairing the OS, reinstalling Vista and then reinstalling 7 again. I dunno what else to try at this point. I've tried it a couple times now and always does it. I don't understand what's going on so any help would be greatly appriciated. Edit: Don't have specific specs with me atm but I've checked and it's 64 bit compatable.