"Sponsored Link"

Well, if you mean this website those are from this website itself, and are not from anything on your computer.

If you mean that it happens on ALL websites then you might have something installed on your computer but from what you describe you are simply visiting websites that are using this new medium and your puter is clean (this type is done ON the actual website and not through anything on your computer).

If you don't want to see them here on Able2Know you can enter your profile and change the template (style) to a different one. But on other sites they probably do not offer a way to remove them so you'll ahve to either avoid them or ignore them.

Either way, it sounds like regular advertising and not any malware.

Based on your very limited description, Craven is probably right, but as he mentioned it is possible to get infected with adware which reproduces the same effect across many sites. If you think your PC has a problem, start off by installing, updating, then running Spybot & Ad-Aware, then if you still need more help see here: http://www.able2know.com/forums/viewtopic.php?t=21110