I have a Dell Inspiron 1545 laptop , running Windows 7 Home Premium . All was set with picture covering the full screen ; then my cat walked on the upper left top keys and now the screen doesn't cover the entire area . It is as if he minimized it about half size. I tried the standard fixes such as the minimize and full screen thing in the upper right corner of the page . Not working. What do I need to do ? Thanks , Carolyn from Arkansas