Hi all,
I have the vista home premium. The problem is (not actually problem) I want to upgrade my vista to ultimate edition. I have ultimate CD. So in order to install it what I have to do? because I don't want to loose any files, software/games in my pc.
so is it possible install ultimate instead of home premium without loosing anything. and tell me what I need to do. I tried in windows any time upgrade but its asking for buy on-line I cant see any option for upgrade from CD

please help
thanks.