Oh wait! Now that you explained it, that happened to me a few times. Bring up an IE window. At the top, click on Tools. Click on Manage Add-ons. Disable things (one at a time until you figured out what it is,) like SunJava, if you added any Google Toolbar thingies, and any unnecessary things you my have downloaded.
I reformatted my whole computer once because IE was crashing & freezing. (It was the only browser I had, so I was out Internet completely. Later, I found out it was something Google downloaded. And all I had to do was turn it off so that it wouldn't keep interacting with IE.
a couple weeks ago, I had to do a System Restore and then uninstall the latest Google Updater, as it would automatically re-download the update, without letting me refuse it. It kept screwing up my system. This is the
second time Google messed with my IE.
Another time, it was the SunJava or Java add-ons. Another time, it was some Adobe add-on.