Since I have a Mac, it seemed unlikely that I would suffer from the same virus infecting PCs. I became suspicious of a toolbar I have installed, the Tenchistv sports access toolbar. I have found that this is the source of my popups. If you look in the tools component of the toolbar, you'll find an element called "Predefined Components". If you scroll to the bottom of these elements, you'll find a number of undefined click boxes. If they are checked, this is the source of your malware/adware.
The ads are not at all benign. Many of the companies sent to you are of questionable honesty. Occasionally they are grossly pornographic.
The simplest solution is to remove the Tenchis toolbar from you computer, handy though it is. The other option, if you want to risk keeping an unscrupulous company linked to your computer, is to simply uncheck these boxes. The adware disappears immediately.
Edited by hamluis, 20 January 2012 - 06:56 PM.
Moved from Introductions to AV, Firewall, etc.