Try reseting your IE settings.

This is done by opening ‘Internet Option’ and clicking on the “Advanced” tab. SEE PIC

You don’t have to delete all your personal settings; such as HomePage, Add-ons, etc so it shouldn’t change much (if you have custom settings in your “Connections” tab; you will need to go back and set them to your needs.

http://forum.avast.com/index.php?topic=138330.0