A friend of mine asked me what I might be able to do for his spy-ware loaded laptop. He bought it used from a company that, in turn, bought them from Dell. He has the original issued CD key for WinXP, but the OS install disc has been lost. My question is this: Can I use any retail XP Home Edition install disc to reinstall a fresh run of Windows and use his CD key, or must I acquire a Dell OEM WinXP disc?