I have no problems with my fake Win XP. Been using it for a long time. Although in every start-up there's a notification that would tell to take the " test " to see if my Win XP is really genuine. But me knowing that it's not, I just press cancel over and over again. It doesn't take up my time and so does my money ( which the orig Win XP consumes - although, i`ll face it ... genuine Win XP's will always be better )