Its, probable that you have installed an extra toolbar like hotbar or a gadget like Gator on your pc. What you need is a program which is freeware called 'Spybot S & D' or spybot search and destroy.

This gadget removes spyware and ad-ware from your pc. Do a google search for it. I find it at http://security.kolla.de/

It is a good idea to read the instructions. Techies generally follow the adage, when all else fails read the manual, I would recomend reading at least some of the tutorial first if you are non technical and all of it if you think you are techincal.

I hope that this helps you.