Windows 10: Night Light no longer works after update - Windows 10 version 1909

I just updated this today and now the night light no longer works - as I had it on all the time before my eyes literally hurt looking at the screen now.


The function isn't greyed out - it's there as normal but when I select Turn On it doesn't. The night light adjuster scale also does nothing when I move the scale up or down.


I have followed just about every tip I've read on here but no luck. Can anyone help?

:)

 

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...

 

Windows 10 Night Light Not Working

Hey.

For the past month or so I've noticed that Windows Night Light option isn't working. It's grey'd out and not clickable at all.

I'm not sure whether it's related to Windows Update or not, but I'm guessing it is.

System:

Laptop model: Sager np8153-s (Clevo P650RS-G)

Windows 10 Version 1909

I've updated Intel onboard graphics drivers.

I've updated nVidia graphics drivers.

I've deleted 2 registry lines that are connected to night light settings (as Instructed by fix guides).

I've recovered to an earlier windows update.

My wife also has Windows 10-1909 on a Asus laptop and has no issues whatsoever.

I'm lost. Is there a solution? An official Windows fix?

Thanks in advance.

 

1903 version night light not working

Hi Monika,

it is a known issue in 1903

Night light settings do not apply in some cases

Microsoft has identified some scenarios where night light settings may stop working, for example:

Connecting to (or disconnecting from) an external monitor, dock, or projector

Rotating the screen

Updating display drivers or making other display mode changes

Affected platforms:

Client: Windows 10, version 1903

Workaround: If you find that your night light settings have stopped working, try turning the night light on and off, or restart your computer.

Note We recommend that you do not attempt to manually update using the Update now button or the Media Creation Tool until this issue has been resolved.

Next steps: We are working on a resolution and will provide an update in an upcoming release.

https://docs.microsoft.com/en-us/windows/releas...