I have tried the: http://support.microsoft.com/default.aspx?...kb;EN-US;328874 article on changing the "Volume License Product Key" via reseting the activation, etc. But it doesn't work. The PC is a dell PC and there's a sticker of the authentic Windows cd key on it. However I believe this cd key is for the OEM version of windows xp. If so, is it possible using this oem cd key for this windows xp corp? Coz I tried entering it in via the above method and it just keeps on saying invalid key. Or maybe the key is for original windows? Does it make a difference whether my current windows is SP2?