I think you have a problem with
Greatsearch
on your internet explorer start page?
You can remove this problem by downloading SPYSWEEPER.
It's very simple to uninstall Greatsearch, you just need to
Download
SPYSWEEPER
And get rid of this annoying Greatsearch!!!
Spysweeper will help you with all the other annoying ADS, too!
So you better go and download it now!