my buddy used Windows Anytime Upgrade to upgrade now he says he wants to go back can he.?? i thought i read awhile ago on here that you could start the Windows Anytime Upgrade and just enter the home premium key when it promts him for the key .is this right . or how to you start the Windows Anytime Upgrade again from within windows 7 ultimate. it doesn't apear to exist anymore. any info would be great or is a format the only option.