i installed xp home when i made my pc but didnt bother avtvating it (il do it later) forgot! now im unable to log on at all. i now have an upgraded version of xp (pro) and want to install that instead but i cannot do anything to my systiem. i can play about with the bios but that is it. does any1 have any clues as to what i can do to install a different version (or even the same 1) onto my PC. cheers!