I have encountered this problem three time already in two months. It has happened with Jedi Knight 2 and Tribes 2, but surprisingly not with MS Dungeon Siege. Luckily I have gotten around with no-cd cracks. Still a nuisance though. It got bad when my wife tried to play the Sims. Couldn't find a no cd file, and I shouldn't have to. It seems to have started after an XP update that was for compatibility. Tried to restore, but it's not letting me go back that far. Any suggestions or solutions? If this happens with GTA 3 and I don't have a cd crack, I'm going to kill someone. Thanks.