+ 0 Votes No. As long as you have it installed on only ONE computer seacarl 6 years ago I've redone my system several times and even built a new compter. At least 3 times, when I installed XP, it wouldn't let me activate it. There is a toll-free number you can call. They will ask you if this is the only computer you have this copy of XP on. If you anser YES, they will give you a number to allow you to activate it. The magic word here is that you have it installed on only ONE computer.