How to Fix Windows 10 Brightness Control Not Working

If your Windows 10 brightness control isn’t working, it can be frustrating, especially when you’re trying to adjust your screen for comfortable viewing or to save battery life. This guide walks you through practical steps to troubleshoot and resolve the issue, restoring your ability to adjust brightness seamlessly. Before starting, ensure your system is up to date, and you have administrator access to your computer, as some fixes require elevated permissions.

What You’ll Need

• Windows 10 PC with internet connection
• Administrator access to your user account
• Optional: Latest display drivers from your manufacturer (e.g., Intel, AMD, Nvidia)

Step-by-Step

1. Check Basic Settings: Ensure that your brightness controls are enabled in Windows. Click on the Start menu, open Settings, then go to System > Display. Under Brightness and color, see if the brightness slider is available and responsive.
2. Use the Action Center: Click on the notification icon in the taskbar (bottom right corner). Look for the brightness slider in the quick settings panel. If it appears, try adjusting it directly. If it doesn’t work, proceed to the next step.
3. Update Display Drivers: Outdated or incompatible drivers are a common cause. Right-click on the Start button and select Device Manager. Expand the ‘Display adapters’ section. Right-click your display device and choose ‘Update driver.’ Select ‘Search automatically for updated driver software,’ and follow the prompts. Restart your PC after updating.
4. Reinstall Display Drivers: If updating doesn’t help, try reinstalling the drivers. In Device Manager, right-click your display device and select ‘Uninstall device.’ Confirm and restart your PC. Windows will attempt to reinstall the driver automatically. If not, download the latest driver from your GPU or motherboard manufacturer’s website and install it manually.
5. Check Windows Power Settings: Sometimes power plans affect brightness controls. Go to Control Panel > Hardware and Sound > Power Options. Click on ‘Change plan settings’ next to your active plan, then ‘Change advanced power settings.’ Expand the ‘Display’ section, and verify that ‘Enable adaptive brightness’ is turned on or off as needed. Also, ensure that ‘Display brightness’ is set to a reasonable level.
6. Disable and Re-enable Adaptive Brightness: In the same Power Options menu, locate ‘Display’ > ‘Enable adaptive brightness.’ Turn it off, apply changes, then turn it back on. This can reset the feature if it’s causing conflicts.
7. Run Windows Troubleshooter: Windows includes troubleshooters that can detect and fix common issues. Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters. Select ‘Power’ or ‘Hardware and Devices’ and run the troubleshooter, following on-screen instructions.
8. Check for Windows Updates: Keeping Windows up to date ensures compatibility and bug fixes. Go to Settings > Update & Security > Windows Update. Click ‘Check for updates’ and install any available updates. Restart your PC afterward.
9. Modify Registry Settings (Advanced): If the above steps don’t work, you can tweak a registry setting. Press Win + R, type ‘regedit,’ and press Enter. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\\Microsoft\
   Display\

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   How to Fix Windows 10 Brightness Control Not Working