First off i want to say i'm an idiot. i bought windows 7 at best buy (big mistake) thinking it was the full version but i actually got the upgrade version. got the disk and installed the 64-bit operation system and then relized that i had just installed the update version. the os is running but i get a message it's not genuine. so here's my question. once i get the full version do i need to uninstall the update version im running now or can i just pop the cd in and download the os again without no problems? i got the update version of windows 7 but didn't i need a existing os to upgrade (like vista or xp)? the wierd thing is the os is running but i had no os to upgrade? Did I really screw things up or is this a minor problem? Please help!