Perform a repair of Internet Explorer. From Control Panel select Add/Remove
Programs. Scroll down to Microsoft Internet Explorer and highlight it. Click
on the Add/Remove button. When the IE Tools menu comes up, select Repair.
Click OK.
If repairing does not work, uninstall and reinstall IE. At the same IE Tools
menu, select "Restore the previous Windows configuration". Then reinstall
Internet Explore.
You can also access the IE Toolbar by clicking Start > Run and type
rundll32 setupwbv.dll,IE6Maintenance