What to Do When Windows 11 Night Light Is Grayed out and Won’t Turn On
- 5 ways to do it
- Needs administrator rights
- Includes a restart or sign-out
Night Light in Windows 11 makes your screen colors warmer and softer after dark, which cuts down on harsh blue light. When its switch is grayed out and won’t turn on, the usual cause is that your PC is running the generic Microsoft Basic Display Adapter driver. It should be running the proper driver from Intel, AMD, or NVIDIA.
Updating your graphics driver is the fix that works most often. The other sections below cover display settings, a sign-out, a graphics reset, Windows updates, and conflicting color apps. Some guides also suggest a change in the Registry Editor, but none of the steps here need it. Work through the sections in order and test Night Light after each one, so you know which fix did the job.
To fix when Windows 11 night light is grayed out and won’t turn on, you usually need to update your graphics driver. Right-click the Start button, select Device Manager, expand Display adapters, right-click your graphics card, and choose Update driver. Restart your computer after the update finishes.
Method 1Update Your Graphics Card Drivers
An outdated or generic graphics driver can stop Windows from controlling screen colors, and that leaves Night Light grayed out. Updating the driver through Device Manager replaces that software. Updating the driver is also the fix most likely to work.
- Right-click the Start button on your taskbar and select Device Manager. A window opens with a list of your hardware.
Device Manager - Click the arrow next to Display adapters to open the list.
- Find your graphics card, for example Intel HD Graphics, NVIDIA, or AMD. If you only see Microsoft Basic Display Adapter, that is the likely cause of the problem. Windows has no real graphics driver loaded.
- Right-click your graphics card name and select Update driver.
- Choose Search automatically for drivers.
- Follow any instructions on your screen to let Windows find and install the newest software. Your screen may flicker or go black for a moment during installation. That is normal.
- Restart your computer when the installation finishes, then check whether Night Light is available.
If Windows says the best driver is already installed but Night Light is still grayed out, check Settings Windows Update Advanced options Optional updates for a driver update. You can also download the latest driver from your PC or graphics card maker’s website. Those are often newer than what Windows finds on its own.
Method 2Check Your Display Settings and Multiple Monitors
Windows applies Night Light to the display you have selected. If the wrong monitor is selected, or a second screen is confusing things, the switch can look unavailable. Check the display page in Settings to confirm Windows is looking at your main screen.
- Click the Start button and open the Settings app (the gear icon).
Settings - Click System on the left side, then click Display on the right. You should see the display settings page.
- Make sure your main monitor is selected and active. If you have several screens, the numbered boxes at the top show them. Click the box for your main monitor.
- Scroll down to the Night light setting, which is under Brightness & color. Check whether it is still grayed out.
- If you use more than one monitor, disconnect the extra screens and see whether the main screen unlocks the Night Light switch. If it does, reconnect them one at a time to find the one causing trouble.
Some external monitors, docks, and adapters don’t pass color information back to Windows. Night Light may then work on your laptop screen but not on that monitor.
Method 3Sign Out and Sign Back In
A sign-out clears temporary profile glitches that can freeze display settings such as the Night Light switch. Windows reloads your personal settings and background services, and you don’t have to restart the whole computer.
- Save your work and close open programs.
- Press Ctrl+Alt+Del on your keyboard at the same time. A blue options screen appears.
- Click Sign out.
- At the login screen, click your profile name and sign back in with your password or PIN.
- Open your display settings and check whether the Night Light switch works now.
Settings › System › Display
Method 4Fix Registry Values for Display Settings
Resetting your scaling and resolution to the defaults makes Windows refresh the display profile. That can clear temporary glitches that keep Night Light grayed out.
- Click the Start button, type Settings, then open the app.
- Go to System Display. Scroll down to the Scale & layout section.
- Set Scale and Display resolution to the values marked Recommended. If they are already set that way, change each one to another value, apply it, then change it back. Windows asks you to confirm; click Keep changes. Either way, Windows refreshes the display profile and clears temporary glitches.
- Restart your computer to apply the refreshed display settings, then check Night Light again.
If the Recommended label isn’t there, or you can only pick a few low resolutions, that points back to the basic display driver. Go back to the driver section.
Method 5Check for Windows Updates
Microsoft fixes display bugs through regular updates, including bugs that gray out Night Light. A full update also makes sure your system has the files the display settings depend on.
Note: You need administrator permissions to install Windows updates.
- Open the Start menu and click Settings.
Start Menu - Click Windows Update on the left side of the window.
Settings › Windows Update - Click Check for updates. Windows searches and lists anything available.
- If Windows finds updates, let them download and install completely. Large updates can take a while, so keep the PC plugged in.
- Restart your computer when prompted to finish the installation, then check Night Light again.
Unique Expert Tip 1: Reset the Windows Graphics Subsystem
Restarting the Windows graphics subsystem clears hidden display glitches that can leave the Night Light button grayed out. A keyboard shortcut restarts it instantly, with no reboot.
Note: This troubleshooting step requires an administrator account.
- Press Win+Ctrl+Shift+B all at the same time.
- Your screen flickers black for a brief second, and you may hear a short beep. That means the shortcut worked. The shortcut tells Windows to restart the graphics driver.
- Wait a few seconds for your screen to return to normal. Your open programs stay open.
- Open your display settings and see whether the Night Light switch is active.
Unique Expert Tip 2: Disable Third-Party Color Management Software
Third-party color tools such as f.lux or custom gaming utilities can conflict with the display settings built into Windows 11. When an outside app takes over your screen colors, Windows may disable the Night Light switch to avoid display errors. Closing or removing those tools lets Windows take control again.
- Look at the bottom-right corner of the taskbar, near the clock. Click the arrow for hidden icons if there is one. Check for any running color or screen utility icons.
Taskbar - Open Task Manager by pressing Ctrl+Shift+Esc.
Task Manager - Look through the running apps and background processes for any third-party screen or color management programs. Graphics card control panels and monitor utilities can also change colors.
- Click the conflicting app, then click End task.
- Uninstall any software you no longer need. Go to Settings Apps Installed apps, click the three dots next to the app, and choose Uninstall.
- Restart your computer and check your display settings.
If Night Light works once the tool is gone, you can decide whether you still need that tool. Running two color tools at once is what causes the clash.
Summary
A grayed-out Night Light switch in Windows 11 is usually fixed by updating your graphics driver. The other fixes are checking your display and monitor settings, signing out and back in, restarting the graphics driver, installing Windows updates, and removing apps that fight over screen color. Test Night Light after each step so you know what worked.
Frequently asked questions
How to turn 🪟 Windows 11 dark?
Open Settings, select Personalization, then click Colors. Next to Choose your mode, pick Dark. Windows applies the change right away, switching the taskbar, Start menu, and supported apps to dark colors. To make only apps dark, choose Custom and set Choose your default app mode to Dark.
My 🪟 Windows 11 nightlight isn't turning off. How can I fix this?
Open Settings, go to System, then select Display and turn off Night light. If it turns back on by itself, a schedule is set. Under Night light, open the options and set Schedule night light to Off, or choose Set hours and change the times. Restart your computer if the switch still changes back.
Why is my 🪟 Windows 11 just a black screen?
A black screen usually means the display driver stopped responding, the cable is loose, or Windows did not wake properly. Press Win+Ctrl+Shift+B to reset the graphics driver. If the screen stays black, unplug and reconnect the monitor cable, then restart. Hold the power button for 10 seconds to force a shutdown.
Why does my computer not wake up from sleep mode in 🪟 Windows 11?
Your mouse or keyboard may not be allowed to wake the computer. Open Device Manager, expand Mouse and other pointing devices, and double-click your mouse. On the Power Management tab, check Allow this device to wake the computer, then click OK. Repeat for your keyboard under Keyboards. Restart afterward to test.
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About the Author
Richard
Tech Writer, IT Professional
Richard is a writer at Geek Rewind who turns complex IT tasks into clear, step-by-step guides. He draws on years of hands-on experience in system administration and enterprise IT operations, focusing on Windows, Linux and WordPress: the problems people actually run into, and the fixes that work. His server and WordPress guides come from systems he runs himself. Richard builds and maintains the platform behind Geek Rewind, from its Ubuntu servers and Nginx configuration to its custom WordPress plugins. Many new tutorials start with readers' questions, and he's always glad to answer them in the comments.
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