Win10 screen brightness adjustment tutorial?

Problem performance:
First, try to uninstall the discrete graphics driver in safe mode, the screen brightness can be adjusted freely after uninstalling;
? Second, check the device manager found that the discrete graphics driver is not installed, when The brightness is still not freely adjustable after installing again.
Workaround:
? Right-click "Start Menu" ”—— select “Run”——Enter“regedit”, press Enter to open the registry, and then expand:
{HKEY_LOCAL_MACHINESYSTEMControlSet001ControlClass{4d36e968-e325-11ce-bfc1-08002be10318}
Modify the KMD_EnableBrightnessInterface2 key value in 0000 and 0001 to 0.
In addition, if there is no such key value, create a new one and type it as DWORD. If there is no 0001, just modify the key value in 0000.
Restart the device after the modification is complete, and then try to adjust the brightness.