Whenever posting questions on these forums, please give us as much information as possible about your computer. Depending on your issue, we might need the operating system, processor speed, amount of RAM installed, brand name of the computer, (if there is one), and any EXACT error messages you are receiving, and any other information your think might be valuable. The more information you give us, the better informed our answer will be.
In the meantime, have you tried "repairing" it?
How to Repair Internet Explorer 6 Using the Repair Tool (Win 95-2000)
How to Reinstall or Repair Internet Explorer and Outlook Express in Windows XP
Hope this helps.
I have Version 6.0.2800 of IE - i am constanly getting a lockup with IE-after clt/alt/delete-it indicates not responding-this is going on for months-any suggestions?