The primary argument is .
while technically running in a borderless window.
Should you blindly toggle the setting? No. You should test it. Here is how to check if your specific game benefits from disabling FSO: fullscreen optimizations on or off
If you’ve ever dug into the Properties of a game’s .exe file, you’ve seen it: But should you check that box or leave it alone?
For the average player, this is negligible. However, for high-level competitive play (think Counter-Strike 2 , Valorant , or Overwatch at 300+ FPS), every millisecond counts. Players turn FSO to force the game back into "Exclusive Fullscreen" mode. The primary argument is
If your in-game gamma/brightness sliders aren't working, this feature is usually the culprit. 🛠️ How to disable it for a specific game Right-click the game’s .exe file. Select Properties . Go to the Compatibility tab. Check "Disable fullscreen optimizations." Hit Apply and restart the game.
DirectX 12 and Vulkan games do not even support traditional "Exclusive Fullscreen". Disabling FSO for these titles is generally useless and can sometimes cause instability. For the average player, this is negligible
For most modern systems and games, Microsoft recommends leaving this feature .
If you have ever dug into the compatibility settings of a game executable on Windows 10 or Windows 11, you have likely stumbled upon a checkbox labeled