Thats your opinion, but IMO I think Windows Vista certainly performs better than XP, its a hell of a lot more responsive and I noticed this when the OS was still in beta, once things like indexing and system restore are turned off the OS performs better and less HDD activity. I dont understand why Vista performs so crap on some peoples machines, its as if they dont know how to set it up, I always used to have problems with XP more so than Vista, but XP was a good OS, Vista has improved on that IMO. Yes some games do have lower fps, but all the games are still as playable, Crysis has very low FPS at first in Vista but it has came a long way, same for CSS, my fps is only about 10-20fps out on that game now.