I am trying to instal a copy of windows XP SP2 onto my computer, i already have a copy of windows installed but not activated, but when i try to reinstal windows it gives me an error that there is no HD and to make sure it is connected but when i start normally it goes right into win XP, although i cant login since it isnt activated. Also, i wanted to know if i can just use my product key and activate the windows i already have so i dont have to do a fresh instal?