The transition was fairly painless and I didnt lose anything at all. Everything ran smoothly for a while.. BUT..now when I try to hit the "Start" button I get "Critical Error" and I have no other option but to log off..I have tried everything I could find online to fix this but nothing works so I live with it.. I have to open Explorer and I can get to my programs that are not on my desktop, and I can navigate to Control Panel thru Explorer too..just cant hit that Start Button or I will be logged out of my account. Such a Pain! I loved Windows 7!