I followed your advice, but the "Change Settings" button is greyed out. My current display driver
does not allow changes to be made to hardware acceleration settings.
I tried a system restore, but that didn't work.
I normally set my computer's resolution setting at 1680 by 1050 pixels. I lowered my resolution to 1280 by 1024 pixels to make the black bars disappear, but the screen soon looks stretched horizontally with bigger fonts and the picture doesn't look right.
The black bar at the right side of my computer screen is so annoying!