hey I also had the same problem but changing fullscreen to true and correcting resolution setttings failed to work however there is a third solution change force directx10 to true and oila fullscrceen. dell laptop i7 5500u at 2.4 -3.0 8gb ram NVidia GeForce 840m 2gb resolution 1366*768 60p ghz hope someone finds this helpful:)
Does not work full screen
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