this video will show you how to dis­able Fullscreen Opti­miza­tion on Win­dows 10
1. Disable Fullscreen Optimization App-Wise
- Right-click on the .exe file of your game and select Properties.
- Navigate to the Compatibility tab.
- Tick the "Disable fullscreen optimizations" option. Click Apply to save all settings.

2. Registry Editor for All Apps & Games
- Press Windows Key + R then type regedit in Run dialog box to open Registry Editor. Click OK.
- Go to: Computer-HKEY_CURRENT_USER-System-GameConfigStore
- Find GameDVR_FSEBehaviorMode , change the Value data from "0" to "2".

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