Internet Explorer add-ons, such as ActiveX controls and browser toolbars, are used by some Web sites to provide an enhanced browsing experience. An error may occur if an add-on is damaged or if an add-on conflicts with Internet Explorer. To determine whether the error is caused by an add-on, run Internet Explorer in "No Add-Ons" mode. To do this, follow these steps:
Click Start, and then type Internet Explorer in the Start Search box.
Click Internet Explorer (No Add-Ons). Internet Explorer opens without add-ons, toolbars, or plug-ins.
Test Internet Explorer to verify that it works correctly. (from Microsoft: http://support.microsoft.com/kb/936213)
You could also stop using IE and switch to Chrome or Firefox!