as the title says

I have updated to latest anti viruses software, done several C drive scans (Full and Quick scans), with zero returns on any viruses,etc.

every time I click on a thread, or Today's Posts icon, the ads are always different.
see images for eg below.

Unnamed QQ Screenshot20140902175614.pngUnnamed QQ Screenshot20140902175148.pngUnnamed QQ Screenshot20140902175119.pngUnnamed QQ Screenshot20140902175207.png