When you click, (or double click), the IE icon on your Desktop, nothing happens at all?

Try this. Goto Start > All programs > Accessories > System Tools, then find and click the "Internet Explorer (No Add-ons)" link.

Does IE open now? If so, this is IE's "Safe Mode" which opens with all add-ons and 3rd party extensions disabled.

This allows you to investigate IE's Add-ons, (Tools > Manage Add-ons), and disable them all to test the full version of IE again.

Try that.

Mark