With the Internet Explorer 8, you can view and manage Add-Ons that programs can put into the Internet Explorer. There may be some there slowing down the Internet Explorer and some you don't even need.
1. Go to Tools / Manage Add-Ones
2. This will show the Name and Status (Enabled or Disabled), and how long each is adding to the load time.
3. If you want to disable one, highlight it and click on the Disable or Enable button in the lower right hand corner.