Windows 10: Windows 11 Home, Night Light option is suddenly greyed out for one user.

Hello!I've faced a quite weird proble with Night Light, suddenly it became grayed out and I'm unable to enable it, but other usres on the computer can.I've tried:Checked Night Light toggle in Windows settings greyed out Enabling Night Light via PowerShell commands Executed Windows API calls to enable Night Light failed due to CoreWindow thread error Verified status of related services Connected Devices Platform Service, TokenBroker Examined and modified registry keys under CloudStore and BlueLightReduction paths Attempted to delete local app data caches for Microsoft.Windows.CloudExperie

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Night Light option greyed out

The NIGHT LIGHT option is greyed out. Had tried various suggestions including edit the registry and restart. The option is still greyed out. Am using an ASUS UX331U with Nvidia Geforce. Would appreciate help to resolve this.

 

No Night Light

Hi allisonb1

Try these steps

Option 1. Reset Night Light-related Settings on 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.

Option 2 . Modify Registry to Fix Night Light Not Working on Windows 10 Fall Creators Update

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.

Source:

https://www.tenforums.com/tutorials/73518-turn-...

https://www.drivethelife.com/windows-10/night-l...

 

Night Light Greyed Out

Just installed Win v1703 and found that Night Light settings remain all greyed out.

I've tried setting Radeon R9 370 to GPU Scaling = On and rebooted system. No change.

After this major v1703 update that provides the Night Light feature, users shouldn't have to dicker with Registry.