You cannot modify the registry in full screen when playing games on Windows 7.

1. Open "run" in the Start menu and enter "regedit" in the Run box to enter the registry;

 

Then go to the registry: HKEY_LOCAL_MACHINE-SYSTEM-ControlSet001-Control-GraphicsDrivers-Configuration

Find Configuration on the right and right-click it;

Find Scaling, right-click and choose modify, and change the value to 3 (only valid for some games ).

2. then we shut down the registry and right-click the desktop to adjust the computer resolution to 1280 × 768b. Then we right-click the empty fold on the desktop, click "properties", click "Advanced", and then click "Display Card". Then, click "Desktop & Display", and then click the laptop icon in the lower left corner, select "configuration"> "full screen"> "OK", and then adjust the resolution to 1366 × 768, which is very simple.