I built my computer when the beta came out. So I did not buy a new copy of xp or vista. It is strictly running off of win7 RC at this time. I have never done an upgrade to any of my computers and never will do an upgrade, as I no most of you guys will never do. I am wondering about the following list. 1. Is the offer for $99 for an upgrade or full version of win 7 professional? 2. Will the upgrade disk do a clean format and a fresh install? 3. Will I have to have xp or vista installed before loading the upgrade disk? 4. Or will I have to wait till the full retail ver. comes out.