a friend of mine was given a pentium 4 pc with win xp.it is infested with everything. virus, bugs, worms porno, you name it its got it. needs a fresh install after wiping everything out. trying to plod through it all and weed out the bad stuff is out of the question. the guy doesn't know much about computers anyway and just wants to start clean. is there anyway to reformat without buying a new copy of win xp home edition?