Internet Explorer Clicks open Unwanted Sites

Hello,

I have a Dell Laptop with Windows 7 installed on it. I have some issue with Internet Explorer. Whenever I click a check box or list, it opens unnecessary links like this :


Internet Speed

This happens often with Banking and Travel Websites like AxisBank, Cleartrip etc.

I have tried installing many Anti-Virus programs but to no effect. The problem still continues.

Could someone please help me out?