I'm running the evaluation copy of Windows 7 Ultimate version 7000. I've received, as have some of you folks, an invitation to prepurchase the new Windows 7 Home Premium, Professional and Ultimate OS as an upgrade that will be available in October. My question is this; Will the new systems upgrade from this version I'm running now or will I have to reinstall my original OS (Vista Home Premium, 32 bit) and use the new purchase to upgrade from that? I really like some of the features of this Ultimate OS, but I only want the Home Premium version which is a lesser version. Will the Home Premium version upgrade the evaluation version of Ultimate?