Recently, when many computer users upgrade Win 10, the screen brightness cannot be adjusted normally. Some are too bright and dazzling, but they can't adjust the brightness of the screen. The other is that the screen brightness is too low and the screen is too eye-catching. So what is the reason for the brightness level of Win 10 screen and how to solve it?

Let's start with the reason. Because the screen brightness level will not work because of upgrading or installing Win 10, obviously, the problem lies in the compatibility of Win 10. The screen brightness of Win 10 cannot be adjusted, which is mainly caused by the following situations:

1) The computer is equipped with dual graphics cards, that is, it is equipped with an independent graphics card, and the CPU also has a built-in core graphics card;

Because the Intel Core i3/i5/i7 series processors have built-in core graphics cards, and the Core I series processors have been launched for several generations, sometimes the driver versions are inconsistent, which leads to the conflict between the CPU core graphics card and the discrete graphics card, and the screen brightness cannot be adjusted normally.

2) Win 10 system installed by using one-button Ghos tool;

3) The graphics card driver has been updated with the driver wizard or Master Lu and other tools.

Reinstalling the system with one-button Ghost or updating the graphics card driver with the driver wizard will lead to the change of the graphics card version, while some brands of computer graphics cards can only use drivers debugged by their own brands, while the graphics card drivers installed by Ghost and the driver wizard are usually some common versions, which leads to inconsistent driver versions, resulting in compatibility problems and inability to adjust the screen brightness.

Second, the solution of Win 10 screen brightness can not be adjusted

If the screen brightness of Win 10 cannot be adjusted, how to solve it? Here are some useful ways for individuals to test computer Pepsi. I hope I can help you.

Method 1: Modify the registry to solve the problem that the screen brightness of Win 10 cannot be adjusted.

1, used for the first time

Win+R

Combine shortcut keys to open the Win 10 running dialog box, and then enter the command: regedit.

When finished, click OK below, as shown in the figure below.

2. After opening the registry editor, expand the location in turn: HKEY _ local _ machine \ system \ control set 00 1 \ control \ {4d36e968-e325-1ce-bfc1- Then change the value of KMD_EnableBrightnessInterface2 in 0000 and 000 1 to 0.

3. After completion, restart the computer.

Note: If there is no 000 1, change it to 0000. If KMD _ EnableBrightnessInterface 2 2 is not found in these two items.