dark shadow at the right corner of my screen display?.

The Problem is that I see a dark shadow at the right corner of my screen display?.

Is it a hardware problem or male-ware or a virus , may-be my PC needs a repair or a change of its screen.?

( Please note that my PC is running very well with no problem and no damages as well. then I get the same dark shadow of display if I connect it to other monitor or even a TV..) ..

Is there a solution for problem ?!.

I did un-install and re-install the driver software & Both Driver the NVIDIA High-Definition (HD) Graphics Driver , and the Intel High-Definition (HD) Graphics Driver.

I think. I have nothing missed out but I still have the same problem ..

I would appreciate your advice on this subject..!