Some of Internet Explorer’s add-ons can increase a required time to start IE, reducing the browser’s performance and slowing it down. Fortunately, in Windows 7 you can easily find which IE8 add-on takes the most time at IE startup, and disable it as follows:
1. Launch Internet Explorer
2. Click on Tools, select Manage Add-ons
3. Check the Load Time in the right-hand column
4. Right-click on selected add-on and disable it, if you wish.
Restart your IE.