Night Light Not Working in Windows 11: 7 Easy Fixes

Night light not working in Windows 11 is a common complaint, and it is usually easy to fix. Night light is the Windows 11 feature that warms your screen colors in the evening to reduce blue light. When night light is not working, the toggle may be greyed out, it may switch off by itself, or the screen may stay cool even though Night light says it is on. The seven fixes below cover each of those cases.

Quick answer: toggle Night light off and on in Settings, System, Display, check the schedule and location settings, update your display driver, and restart. If the switch stays greyed out, reset the Night light settings stored in the registry.

What Causes Night Light Not Working in Windows 11?

Night light relies on your display driver and a small set of saved settings. It stops working when: Problems like this often travel together, so it also helps to know the taskbar freezing guide, the Start menu fix and the Windows 11 update stuck at 46% guide.

• The graphics or display driver is outdated or damaged.
• Location services are off and the schedule uses sunset to sunrise.
• HDR or a custom color profile conflicts with the color adjustment on some setups.
• The display connects through an adapter or USB graphics device that does not support the feature.
• The saved Night light settings in your profile are corrupted.

How to Fix Night Light Not Working in Windows 11: Step-by-Step

Step 1: Toggle Night light and test the strength

Open Settings, System, Display, and select Night light. Click Turn on now, then drag the Strength slider. If the screen changes color, the feature works and the problem is only your schedule. Turn it off and on again once to refresh its state. If this first step does not solve it, the Windows V clipboard fix and the missing power plans guide cover related causes.

Step 2: Check the schedule and your location

If you chose Schedule night light with sunset to sunrise, Windows needs your location and correct time zone. Open Settings, Privacy and security, Location, turn location services on, then set the right time zone under Time and language. Alternatively choose Set hours and enter your own times.

Also Read: https://axeetech.com/how-to-fix-windows-11-taskbar-freezing-complete-guide/

Step 3: Update the display driver

Install the latest driver from your PC maker or the graphics maker. Our manual driver update guide shows the Device Manager method, and Windows Update often offers optional driver updates under Advanced options.

Step 4: Check HDR and color profiles

Open Settings, System, Display, HDR, and turn HDR off for a test. Also remove any custom color profile in Color management. If Night light starts working, HDR or the profile was in the way, so adjust those settings for your usage.

Step 5: Restart and install Windows updates

Restart the PC, then open Settings, Windows Update and install everything offered. Night light fixes arrive through quality updates. If problems appeared right after an update, try the Windows troubleshooter steps and consider uninstalling that update.

Step 6: Reset the saved Night light settings

Back up the registry first. Sign out, then in Registry Editor open the key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Current and delete the two entries whose names contain bluelightreduction. Restart and set Night light up again from scratch.

Step 7: Reinstall the display driver

In Device Manager, right-click your display adapter, choose Uninstall device, restart, and let Windows reinstall a basic driver. Then install the maker driver again. Check the Microsoft support pages if the option stays missing.

Night Light Greyed Out on an External Monitor

Night light uses the color pipeline of the graphics card. Monitors connected through USB display adapters, some docking stations and remote desktop sessions often do not support it. Connect the monitor directly with HDMI or DisplayPort for a test. If that works, the adapter is the limit, and you can use the monitor own blue light or low blue mode instead.

Using a Browser or App Instead

If you cannot fix it, many monitors have a built-in low blue light mode in their on-screen menu. It does not depend on Windows at all, so it keeps working after updates and driver changes.

Common Mistakes When Fixing Night Light Not Working in Windows 11

• Forgetting that sunset to sunrise needs location services and the right time zone.
• Editing the registry without a backup.
• Testing during the day with the strength set to zero.
• Assuming a USB display adapter supports every Windows color feature.

Quick Recap: Night Light Not Working in Windows 11

Check the toggle, schedule and location first, then update the driver and look at HDR and color profiles. If Night light is still not working, reset its saved settings or reinstall the display driver. Most cases are fixed by the driver update or the schedule and location settings.

Night Light Not Working in Windows 11 FAQ

Why is Night light greyed out in Windows 11?

Usually the display driver is outdated or the monitor connects through an adapter that does not support it. Update the driver and test with a direct cable.

Does Night light work with HDR?

On some setups HDR can interfere, so turn HDR off for a test and compare results.

Why does Night light turn off by itself?

The schedule may be set to specific hours or sunset to sunrise, so it switches off when that period ends.

Is the registry reset safe?

It only removes saved Night light preferences, but always back up the registry before editing it.