Removing Burstabit Spyware?

Webbsurfer asks: "I recently returned home from school from winter break, and discovered a good chunk of spyware on my parent's computer. I've ran ad-aware and cleared out the obvious P2P programs, but there's one I can't seem to get rid of. It generates pop-up ads, which come from the burstabit.com domain. Any ideas who these guys are and how to get rid of their junk?"