Night light gives the screen a warmer tint in the evening to make it easier on the eyes. With Windows 10 night light not turning on, the button does nothing, the schedule is ignored, or the option is judolbet88 greyed out.

The feature depends on the graphics driver to change the screen’s colours. Without a proper driver, Windows cannot apply the tint.

Scheduling relies on the clock and, for sunset timing, on location services, so those matter as well.

Why This Happens

Night light fails for these reasons:

• The PC is using the basic display driver, which does not support it.
• The graphics driver is outdated or was replaced during an update.
• Location services are off, so “Sunset to sunrise” cannot be calculated.
• The feature’s saved state has become stuck.

Certain remote desktop and display-link drivers also prevent the tint from being applied.

Simple Troubleshooting to Begin With

Reset the feature from Settings.

1. Open Settings > System > Display and select Night light settings.
2. Select “Turn on now.” If the screen warms, the feature works and only the schedule needs attention.
3. Move the strength slider to see whether the colour changes.
4. Turn “Schedule night light” off and on again, then set custom hours as a test.
5. Sign out and back in, or restart the PC.

If the toggle on the Display page is greyed out, go straight to the driver steps.

Next-Level Steps

Deal with the driver and the schedule.

1. Open Device Manager and expand Display adapters. If “Microsoft Basic Display Adapter” is listed, install the proper graphics driver from the manufacturer.
2. Otherwise, update the existing driver, or uninstall it and reinstall the latest version.
3. For the sunset schedule, open Settings > Privacy > Location and turn on location access for the device.
4. Check that the date, time, and time zone are correct under Settings > Time & Language.
5. Disconnect docking stations or USB display adapters to test whether their drivers are blocking the feature.

If HDR is switched on for the display, try turning it off, as the two features can conflict on some hardware.

Safety and Data Warning

Some online guides suggest deleting registry keys to reset night light. That can work, but mistakes in the registry cause wider problems, so try the driver steps first and export a backup if you go further. Turning on location affects privacy, so review which apps may use it.

Final Thoughts

Night light relies on a working graphics driver and correct time and location settings. Test it with “Turn on now,” update the driver if it is unavailable, and enable location for automatic sunset scheduling.