Windows adjusts the display brightness based on the amount of light that reaches the ambient light sensor of the system. This feature is called Adaptive Brightness and can be disabled in Windows.
- For Windows 10
- Press and hold the Windows () key, and then press the q key.
- In the search box, type the settings.
- In the search results list, touch or click Settings (Apply).
- Touch or click System.
- On the display screen, locate the auto-adjust screen brightness option.
Note: Some laptops do not support this feature and the option is not available. After making any desired changes, you can manually adjust the brightness by using the slider under change the built-in display brightness to close the system window.
- Touch or click the slider to enable or disable the option.
- Touch or click Apply.
- Close the System window.
- For Windows 8(8.1).
If you are using the Windows Modern User Interface (MUI):
- Slide in from the right and touch the settings.
- Touch Change system settings.
- On the System Setup screen, touch the system and devices.
- Touch power and sleep.
- There will be a brightness toggle slider at the top of the screen. Slide the toggle slider to the off position to disable adaptive brightness.
If you are using a legacy Windows desktop:
- Press and hold the Start button to display the Applications screen, and then touch control panel applications.
- Touch hardware and sound.
- Touch Change Schedule Settings.
- Touch Change Advanced Power Settings.
- In Advanced Power Options, touch the +enable option next to the display.
- Locate the setting where adaptive brightness is enabled and set the appropriate option to off.
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