you need to change the set up in your video card.
you must have a dual output video card, so you have to go into the settings for it to tell it to turn off the dual display.
often, there is an icon in your task bar on the lower right, next to the time, that if you right click, it will aloow you to acces the video adapter settings.
The past is gone it's all been said.
So here's to what the future brings,
I know tomorrow you'll find better things