Well at first it didn't seem like a big deal but then it kept getting worse. It started with some popups and I eventually got rid of those (http://www.bleepingcomputer.com/forums/topic49687.html
) Had some other problems which eventually were resolved too. Then the computer started to not load programs, lock up, stall out, hang, whatever you want to call it. Then it started saying that there were disk problems when starting up before loading XP. So I backed up files (which took forever considering that the comp was hanging and stalling out) and attempted reformatting which I've described above.
Another suspicious thing that was happening was that Norton Systemworks kept trying to install itself even though it was already installed. The installer kept looking for a file that I didn't have so I would always cancel the install a million times and eventually it would get to the Norton menu screen. (I'm pretty sure it was an install and not some kind of update) I think this might have been part of the problem that I was havnig with the computer hanging up and I followed this problem via the "send error report" thing that Windows does and found some kind of error in a Norton file. The Microsoft instructions that I was following ended kind of vaguely without a solution. I'm not sure of the details but I will try to find that page.
Hope this helps...