I bought my computer at a flee market and it had windows xp pro on it and have been having trouble getting it validated becasuse there is no product key on the tower anywhere so i can't update the product key and don't have the $$$$ to purchase a copy of windows xp pro. what should i do to get validated? i got a code from the genuine advantage thing from earlier today but where do i put it in to get validated the code is: 8YXQPLD4 if you can help me get validated i would much appricate it. thank you