Hmmm, good point. Maybe try running IE without Add-ons, see if that resolves the problem.
Click on Start, Programs, Accessories, System Tools, Internet Explorer (No Add-ons)
If that resolves the problem then start IE normally and use Tools / Manager Add-ons to disable them a few at a time until you find the one causing the problem. Uninstall it or find an update.
If you do reset IE, might be a good idea to save your Favorites first if you have any you care about.