What Robert said.
HOW TO Reset Internet Explorer (IE6)
====================
Note: The following will delete all cookies. To save them beforehand: IE
File | Import and Export | Export Cookies | save the file in an appropriate
location. To import the backup afterwards: IE File | Import and Export |
Import Cookies | point the wizard to the saved file.
----------------------------------------
1. Click Start, Run, type: “inetcpl.cpl” (without quotation marks) and press
Enter.
2. Select the General tab, and in the Temporary Internet files window, click
"Delete Cookies", and click OK.
3. In the same tab click Delete Files, check the "Delete all offline
contents" box and click OK.
4. Click the Programs tab, and click "Reset Web Settings".
5. Click the Advanced tab, and click "Restore Defaults".
6. Under the Advanced tab, uncheck "Enable third-party browser extensions
(requires restart)".
7. Click OK.
8. Reboot.
Also see
http://www.malwarehelp.org/how-to-reset-internet-explorer-6-to.html