adjust brightness

Question

Unable to adjust the brightness, and because of that unable to work , resolve this issue asap quick

Answer 1

Use these steps in order until brightness control works again.

1. Try the quick brightness slider

• Select the Network icon on the right side of the taskbar.
• Move the Brightness slider left/right and see if the screen changes.
• If the slider is missing, continue with the next steps.

2. Change brightness from Settings

• Select Start > Settings > System > Display.
• Under Brightness, move the Brightness slider and check if the display changes.

3. Check for automatic brightness/content settings

• In Settings > System > Display, select Brightness.
• Turn off options like:
  • brightness automatically when lighting changes
  • Change brightness based on content (set to Off)
• Test manual brightness again.

4. If brightness slider is missing or still does not work

• In the search box on the taskbar, type Device Manager, then open Device Manager.
• Expand Display adapters.
• Right‑click the display adapter and select Update driver, then follow the instructions.
• After the update, restart the PC and test brightness again from the taskbar slider and Settings > System > Display.

5. If using an external monitor

• The Windows brightness slider might not appear or have no effect.
• Use the physical buttons on the external monitor to adjust brightness.

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References:

• Change display brightness and color in Windows
• My laptop no longer adjusts screen brightness - Microsoft Q&A
• how to update display drivers - Microsoft Q&A

Answer 2

If you are unable to adjust the brightness that almost always indicates a problem with the graphics drivers.

1

Right click your Start Button and open Device Manager.

Expand the 'Display Adapters' section.

Please provide a screenshot of that full Device Manager window.

2

Click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Information window.