Maximize full screen on Game start menu is obstructed

After selecting the button to start minecraft from the launcher screen, I am unable to maximize the screen.  The screen will maximize but the lower left corner of the screen is the only part of the window with minecraft in it.  The other 3/4 of the window is black.  See screenshot below.  Changing the settings to Full Screen does the same thing in options window.  I have tried rebooting the computer with no luck.  Stretching the screen does the same thing as maximizing the screen.