Adjust the brightness of the computer screen in Windows 7 system. My friends, please see my tutorial!
Operation method
First, we click the Start icon in the lower right corner.
Then click "Control Panel"
In the new window, we click "Hardware and Sound"
Under Power Options, we select Adjust screen brightness.
At the bottom of the new window, we click the slider of "screen brightness". You can adjust the brightness.
That's all. I hope my explanation will help you!