Internet Explorer can be run without the add-ons installed. This is useful if you run into some kind of error after you installed any particular add-on. In Firefox, this mode is called as safe mode and a similar mode is available for IE. You can open Internet Explorer without add-ons in 2 ways. One way to open is to navigate to start menu-> All Programs-> Accessories-> System Tools-> Internet Explorer (no Add-ons). This opens up IE without ActiveX controls and browser extensions.
Second way is Win + R key which opens Run command, type iexplore –extoff and this will open up IE8 without add-ons.
Opening IE8 without add-ons will help you to find any issues encountered after the installation of any add-on.