I just put my brothers pc together today, using parts from his old dell (hdd, cd-rom, etc) and after I put it up, it goes to his main wallpaper and main 'login' screen and i pick his name and it tells me it needs to be activated. well, i dont want this screen, i want it to tell me to insert a os disk (which i have) so i can cleanly install xp pro, but it doesnt let me. do i need to format his hdd in a another pc (like mine?) or something? i dont know what to do with formatting or know what formatting is. Please help a n00b out in software. Thanks.