[Ragnarok]

Ok I have a user at work that has a ton of popups. I download and have him run Firefox now as a browser which stops the popups while he browses, but now he gets them when just sitting there with no browsers open. I have ran Ad-aware a few times and cleaned it all up but the popups continue. The first scan had 500+ items and then the scans after that had 10 or so but now it is showing nothing. Said user will be working in Autocad or some other program and not even have anything open related to the internet and the popups will roll in. Do any of you guys here have any suggestions on what I could do to stop this, short of a complete wipe of the HD and fresh start?