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Win10 system can not adjust the screen brightness solution

  
After upgrading the official version of win10, the screen brightness can not be adjusted. Steps:
1, use the shortcut key in win10 "Win + R"; open the run window and enter "ldedit" regedit Bring up the registry editor;

2, search in the registry <;featuretestcontrol” option;

3, find the featuretestcontrol option, modify its value data to ffff, and finally click OK, Restart your computer to take effect.

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