Apr. 24, 2018 / Updated by Bessie Shaw to Windows 10
How to Fix Night light not working after Windows 10 Fall Creators Update? Night Light is the feature of Windows 10 Fall Creators Update for those who want to lower the blue light on a display and reduce eye strain at night time. Blue light, as we all know, is the culprit to affect our sleep recycles, while the night light mode on Windows 10 Fall Creators Update as well as its predecessor, Windows 10 Creators Update, can help to filter the blue light and protect our eyes.
However, after the Windows 10 Fall Creators Update, many users complained about the glitch of the night light on their Windows laptop or desktop:
"There's a problem with the night light setting. I can't enable the night light on action center neither in the Settings."
"My Surface comes across Night light failure. It doesn't work after the Windows 10 Fall Creators Update."
"Since the Fall Creators Update, the Night light button is greyed out in both the Settings and the Action Center."
Night light not working issues keep annoying the users after the Windows 10 Fall Creators Update. It may be triggered by different factors, such as incorrectly configured system settings, faulty display or graphics drivers, registry crashes, etc. This post will show you some workable methods to troubleshoot the night light not working problem after the Windows 10 Fall Creators Update.
If you find the night light in the Action Center or the Settings is greyed out after the Windows 10 Fall Creators Update, you can fix it with the steps below:
Step 1. Use Windows shortcut keys Win + I to open Settings.
Step 2. Go to the Privacy menu.
Step 3. On the left side, choose the Location tab.
Step 4. Click the Change button under the Location for this device.
Step 5. Toggle the switch under the Location for this device to ON.
Step 6. Toggle the switch under the Location service to ON.
Step 7. Restart the computer.
Now check the Action Center or the Settings on your Windows 10 Fall Creators Update to see if the night light feature is available.
Graphics card drivers issue can also result in the night light not working, night light not available or greyed-out night light button after the Windows 10 Fall Creators Update. In addition, faulty graphics drivers can trigger issues like black screen problem, graphics error 43, screen flickering after the update, etc. So it's necessary to check the display/video/graphics drivers on your Windows 10 computer.
Here we recommend you use Driver Talent to fix the issue. Driver Talent, which has been reviewed as the intelligent software by engadget, can detect those outdated, incompatible or broken graphics drivers and download the best-matched driver update for your 32-bit or 64-bit Windows 10 Fall Creators Update PC.
Launch Driver Talent and click the Scan button. The driver download and update utility will automatically detect those faulty drivers on your computer.
If there are corrupted graphics drivers, you can click the Repair button to fix the issue. If there are updatable drivers, you can click the Update button to download the proper driver updates, like NVIDIA graphics driver, Intel HD video driver, AMD graphics driver, etc. You can also go to the Uninstall menu to remove the current graphics driver and reinstall it.
After that, restart the computer to make the driver changes take effect. Then go to Settings on Windows 10 to see if you can access to the night light.
Note: Don't forget to backup the drivers on your computer before any changes in case other system glitches occur,
If the methods above didn't work, you may need to modify the registry to fix the greyed-out night light button or the night light not working issue. Note: Windows Registry is a vital database on Windows OS computer. Any misoperation will cause server system problems, such as 100% disk usage issue, blue screen issue, endless reboot, etc. So it's important to backup registry before the changes.
Now let's kill the night light not working and release the pain:
Step 1. Use Windows shortcut keys Win + R to launch Run.
Step 2. Type into regedit.
Step 3. Hit the Enter key.
Step 4. Copy and paste the path into the address bar of the Registry Editor: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\Cache\DefaultAccount
Step 5. Press the Enter key.
Step 6. Right-click the key $$windows.data.bluelightreduction.bluelightreductionstate under the DefaultAccount and select the Delete to remove it.
Step 7. Right-click the key $$windows.data.bluelightreduction.settings and select the Delete.
Step 8. Restart the computer.
Then you can go to the Action Center or the Windows Settings. The night light not working issue has been resolved now and the night light button is available.
That's it. If you still fail to troubleshoot the night light issue after the Windows 10 Fall Creators Update, you can comment below or click the LEFT MENU on this page for technical support. Any other issues you come across after the update, please go to Windows 10 section for more solutions.
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