Windows 10: After making changes to the registry, night light doesn't work

I tried to disable the bloatware that is Microsoft Defender. Is there a way to enable night light without reverting the changes or is there an open source program that can dim the screen and increase color temperature?

:)

 

the night light it doesn t turn on

i have problem with the night light it doesn t turn on what am i doing to??

[Moved from: Windows / Windows 10 / Devices & drivers / PC]

 

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 schedule not working

Hi,

Thank you for writing to Microsoft Community Forums.

We understand your concern as you are unable to schedule the time for Night Light feature in Windows 10. In order to get clarity and to assist you accordingly, please reply with the answers to the questions below.

• What is the Windows 10 version and Build installed? (Type
  winver in Windows search/Run command)
  
• Are you aware of any changes, prior to this issue?

Meanwhile, we would suggest you to update the display driver from Device Manager.

1. Press Windows + X and select
   Device Manager.
   
2. Scroll down and expand Display Adapters. Now Right click on the display devices and select
   Update Driver.
   
3. Select Search automatically for updated driver software.
   
4. Select Update Driver.
   
5. Restart the PC and check

If the issue persists even after updating the driver, then we would suggest you to make the below registry change.

1. Press Windows +R key to open
   run command.
   
2. Type regedit and click on
   Ok.
   
3. Navigate to this location: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\Cache\DefaultAccount
   
4. Here, delete the following sub keys
   
   1. $$windows.data.bluelightreduction.bluelightreductionstate
      
   2. $$windows.data.bluelightreduction.settings
      

Note: Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow
these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Follow the steps to take backup of registry

After deleting the registry sub keys, restart the PC and then enable Night Light feature from Windows settings.

Let us know how it goes.

Aditya Roy

Microsoft Community – Moderator