You can try this:
1. click on IE
2. go to to your root dir (usually C
3. open Documents and Settings folder
4. open "your username folder"
5. open UserData
6. **close IE if you have it open**
rename index.dat to index.old
logoff and log back on (don't need to restart)
open up IE and go to a web page or site that always seemed to load slowly. It should load a lot more quickly now.
Remember:
Always rename or backup.dat or other system files before deleting.