If you use Internet Explorer 9, you’ve probably noticed the new yellow notification bar. One of the things the notification bar tells you is that an add-on might slow down your computer’s performance. The notification also tells you how to disable the add-on or fix the problem.
Add-ons supplement your browser with ActiveX controls and extra features, such as toolbars.
Some add-ons might slow down your computer, but it’s really up to you whether you want to keep using an add-on despite the slowdown. You can use the Add-On Performance Advisor to help identify add-ons that might be slowing you down.
For more information, see: