I have a HP pavilion computer(bought at Walmart really cheap). I use it mostly for the kids games and whatnot. About six months ago I installed limewire on it to download some free music(Iknow this is dumb). My Norton let a worm on the computer and it changed some of my values. Since then I got rid of Norton and got AVG. I went through and got rid of the worm and everything seems to be working fine. I'm just a nervous nelly and was wondering if there is a way to completely gut my windows and computer and start over form scratch. I got the XP disks from HP and am curious if this will make the computer new again.