I was apprehensive about Convert and thought I might have to clean install XP - but after switching to Manual, following the very helpful help file, I installed and upgraded no problems whatsoever ! The only issue was the discovery of my Airport connection - which I had to manually identify. And I must say - Wow !!! What a nice app 4.0 is ! Well done Parallels ! I have been with you since day 1 of release and will continue to use and recommend your product. Excellent job ! There are a lot of people on here with issues - my advice - read the documentation and dont rush it ! I had a very smooth experience with my iMac.