When I'm in a game and I ALT+TAB to another program, when I ALT+TAB back to the game, the screen is no longer full screen, the resolution is greatly reduced, and I need to go back into the display settings to fix it.

The "full screen" mode still has a window around it. I have to go back into the settings, toggle it off and on, and even then sometimes the resolution will be reduced and I have to again go into the display settings and fix it.