Two things to try. First, don't "X" out of IE. Go to
the far left, directly opposite of "X" and click on
"File" instead; then from the dropdown menu, click
"Close." That should work. Second, go to "Add/Remove
Programs" in the Control Panel and click on IE. Doing
so should open options, one of which is "Remove" or
"Uninstall." Do not choose that option. There's
another there that says "Repair" and that's what you
want to try to do. Repair your version of Internet
Explorer.