I have read about some people having trouble with service pack 2, but then again there weren't any more problems than anyone else was having no matter what their computer was running. Many people have said their game works fine with service pack 2. I'm running Windows 7 and it works fine, and I was running XP before I got a new computer and haven't had any trouble with the switch-over.
Please excuse my grammar,spelling,and mispelling. please don't shoot me lol.
some people on the forums which will give you hell for any spelling mistake you might make, and it's very rude but don't take offense to it and just ignore it. It happens a lot so it's nothing new. No one likes a grammar nazi