is there a key on the laptop keyboard that would change the video display? It was working fine but I think a key got hit by accident and now there is a black frame around the video display and "jpeg" files cannot display?
You didn't tell us what version of Windows you are using?
Try right clicking on a empty part of the desktop. Then click on screen resolution and set the screen size to the recommended size. That should solve the black frame problem. The jpg message is probably due to an invalid background image.