Seriously, try to google the problem, by searching keywords that somehow describe specifically what is happening. There may be a fix out there already.
it seems to be on a timer, and pops up every minute or so. the window that pops is not as small as a normal pop-up, and is a normal browser type window.
There is ... and dang it, I'm not on my home machine and can't recall the name of the application that got rid of it. But I was able to google it and find a solution.
If it's the same thing I got, it's a nasty little thing that plants itself in your registry files.