Has anyone considered the possibility that Windows thinks he has two monitors in "extend my desktop" mode and it thinks the default one is the second monitor? This used to happen with some Dell laptops I used to have to deal with. It was infuriating. I think there is a function key to toggle from "extended" to "mirrored" mode, and I think it's F7. It wouldn't hurt to try it. Remember that you need to hold down the "fn" key to make the function keys act as function keys, unless you've changed your keyboard settings.