Yesterday i left my computer with a family member. When i came back the screen was half meaning that one side was fine and the other was pitch black. When i opened firefox or any program half would fit on each side. I asked the family member how it happened but he said it happened himself. I have changed the resolution higher now and its fine but the writing is to small so i would like to know how i can change it back to 1024 by 768 without a half screen. The monitor menu and options haven't been touched,