My projector is not displaying what I want it to.
If you use extended desktop and sometimes you do not see the window when you open a program this is the solution.
You will see the icon on the bottom of your screen but not the open program on your desktop. Your window has opened on the extended desktop which is probably showing on the projector that is not turned on.
To bring the window back to your main desktop press these three keys at the same time,
Shift+Windows Key (bottom of your keyboard)+the right arrow.
The window will appear on your main screen. This also works to send the window to the extended desktop. Just use Shift+Windows key+left arrow.