I seriously don't know what happened to my computer recently. Yesterday I was trying to boot my computer in safe mode and when I turn on computer in normal mode, it showed a black border around the screen. I tried to check my setting(resolution and graphic card setting but still, the problem exists) My resolution is 1366 by 768 which is the native resolution and my graphic card is NVIDIA GeForce GT 525M. Is there anything that I can solve it? The border is about 1cm think, it is around the whole screen and my screen size is 14.1inch.