Maybe your registry got screwed up. I don't know if mine is correct either so please don't think yours is wrong if it is not exactly like mine. Also, beware of messing with the registry, if you screw it up, you will have to reinstall windows most likely. Here is a pic of some of my settings for IE and video:

edit
Oh and if you have never used it, just go to start>run and type regedit. Then navigate to the folder in the string within the image. Please don't mess with it too much if you have never before. I don't want you to mess up your computer.