I recently had a new computer built and was going to have do a 64 bit until I was told that a lot of games and other software won't work properly, if at all, on 64 bit computers. I don't know if that's the problem, but the thought popped into my head when I read your post. I have Windows 7 and have no problems whatsoever on a 32 bit computer. Try running your compatibility wizard and see if it gives you any insight into the problem. Hope this helps at least a little.