Fix: Night Light not Working

Windows 10 night light is a relatively new feature that helps users keep their eyes relaxed by reducing the blue light emitted from our screens. However, plenty of users are experiencing problems with the feature. Some users cannot turn on the night light because the night light button is greyed out from the Action Center. On the other hand, users who can turn on the night light will experience night light not working e.g. night light won’t turn on at the scheduled time or night light will turn on randomly.

Windows 10 night light not working
Windows 10 night light not working

What is Windows 10 Night Light?

Latest research suggests that the blue light emitted from the screen of our devices can put a lot of strain on the eyes and can reduce the quality of our sleep especially if we use the devices before going to sleep. Windows 10 came up with the night light feature that lets a user change the blue light to some other shade. This helps users in keeping their eyes less strained. As a Windows 10 user, you can schedule the night light to turn on or off at certain times or day phases like at sunset.

What causes Windows 10 Night Light to Not Work?

The main reason behind this issue is the Windows 10 update. It is a well-known fact that these issues started with Windows Updates and you will most likely experience these issues after a Windows Update. Both of these issues i.e. night light greyed out or night light randomly starting/stopping are caused by a bug in the Windows 10.


If the nightlight isn’t turning on at the proper time then make sure you have your time and region correctly set. The night light feature uses your location and region to determine the time of sunset and sunrise.

Resetting Night Light

The easiest and the most common solution for both of these problems is to just reset the Night Light from the registry editor. However, we will provide a method that will make the task of resetting night light a lot easier. You won’t have to go into the registry editor and deal with the technical stuff. Simply follow the steps given below

  1. Hold Windows key and press R. Type “notepad” in the dialogue box and press Enter.
  2. Type everything given below. You can copy the information and paste it in the notepad.
Windows Registry Editor Version 5.00




  1. Once done, click File and select Save
  2. Navigate to the location where you want to save the file. Do not forget the “.reg” part when saving the file. For example, a name could be ‘nightlight.reg’.
  3. Now close the notepad and navigate to the location where you saved the file. Double click it to execute.
  4. Click Yes if the system asks you to confirm your actions.
Saving registry commands in registry executable format
Saving registry commands in registry executable format

That’s it. Once the file is run, you should be good to go.

Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.
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Expert Tip

Fix: Night Light not Working

If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Restoro by clicking the Download button below.

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