Annoying Pop Up Window

I keep seeing a pop up window appear in my screen. It flashes for a split-second, and disappears.

I have run a full scan, and nothing comes up.

 

Any thoughts on what it could be and how I can get rid of this?

 

My OS is Vista, and I and using IE version 8.0

Message Edited by coachpaul on 10-19-2009 12:20 PM