My Computer is Flooded With Pop-ups
This one can only have two causes--you're going to too many porn sites, or you have spyware. The first one is easy to fix, the other a bit trickier. Spyware is the software bundled with most file-sharing programs, banner ads or pop-ups with ActiveX controls that will do anything from track your usage of the Net, to send you ads, to collect personal information. The worst kind is used to steal people's identities. Removing spyware can be ugly, but the Dealing With Spyware guide will help you clean your computer efficiently.