I was changing some of the display options of the system configuration so that I could play with fullscreen on my laptop. When I changed to fullscreen, it seemed to have caused an error since I have 2 extended windows, but when I changed it back to windowed screen mode the game simply doesn't work like before. When I try to play the game at my screen's resolution (3072x1920) the game lags like CRAZY. I used to play at around 50-60 fps and now it's at 15 fps with unplayable lag. Now I'm not sure what to do. Any help would be much appreciated!