Windows Hello low light sign-in is coming back, and it fixes a small but annoying problem: face sign-in that fails in a dark room. When your camera can’t see you, Windows briefly turns the screen brighter so it lights your face, then dims it again.
Microsoft is testing it in an Insider build now. Its support page says the feature returns starting November 2026.
Here are the quick facts.
- Testing started in Experimental build 26340.9750, released on October 16, 2026.
- It is off by default, so you have to switch it on yourself.
- It needs a PC with a Windows Hello face camera (an infrared camera plus a color camera).
- PIN and fingerprint sign-in still work as backups.
The short version: nothing changes unless you turn it on, and a normal PC without a face camera won’t see it at all.
How Windows Hello low light sign-in works
Most Windows Hello face cameras have two sensors. The infrared one can see you in the dark. The color camera needs real light to confirm what it sees.
According to Microsoft’s support page, the boost only kicks in when the infrared camera spots your face but the color camera doesn’t get enough light. Windows then raises the screen brightness for a moment.
Once you’re signed in, or the attempt ends, brightness goes back to where it was. You don’t need to reset anything by hand.
How to turn on the brighter face sign-in setting
If you’re on a build that has the option, the steps take about ten seconds.
- Open Settings and go to Accounts, then Sign-in options.
- Expand Facial recognition (Windows Hello).
- Switch on “Automatically adjust screen brightness during face recognition.”
If the toggle is missing, your PC either lacks a face camera or isn’t on a build that includes the feature yet. Press Windows + R, type winver, and press Enter to check your build.
Who can use it right now
For now, only people in the Windows Insider Experimental channel can test it. Beta channel users don’t have it yet, as Windows Mode notes.
The table below shows what shipped in the October 16 round of Insider builds.
| Channel | Build | Brighter face sign-in? |
|---|---|---|
| Experimental | 26340.9750 | Yes |
| Beta | 26220.9739 | No |
| Release Preview (25H2/26H2) | 26200.9807 / 26300.9807 | No |
Insider features can change or disappear before they reach everyone. Microsoft hasn’t given a wider rollout plan beyond the November note on its support page.
What to do if face sign-in still fails in the dark
A brighter screen helps, but it isn’t magic. If the setting is off, Windows won’t touch your brightness, and face sign-in can fail in a dark room.
Microsoft says you can fall back to your PIN or fingerprint if the face scan still doesn’t work after the boost. That’s also the safest habit if you use your laptop in bed or on a night flight.
One practical trade-off: a bright screen in a dark room can be harsh, and it can also be seen by anyone nearby. If that bothers you, leave the setting off and use your PIN in those moments.
What else came with the Insider builds
The same October 16 builds also added a refreshed Gaming Task View in Xbox mode. It now has a navigation bar with quick access to Exit to Desktop and Power Options.
If you follow Windows changes closely, our rundown of the Windows 11 October 2026 update covers what already shipped to regular PCs. You may also like the Windows 11 speed test in Quick Settings, another small feature Microsoft is trying out.
Frequently Asked Questions
Is Windows Hello low light sign-in on by default?
No. You have to turn on “Automatically adjust screen brightness during face recognition” in Sign-in options.
Does my laptop need special hardware?
Yes. You need a Windows Hello face camera with infrared and color sensors. Laptops with only a basic webcam can’t use face sign-in at all.
Will the screen stay bright after I sign in?
No. Brightness returns to its earlier level after sign-in or when the attempt ends.
When will everyone get it?
Microsoft’s support page says it returns starting November 2026. Insider features can still change, so treat the timing as a plan, not a promise.
Our take
This is a small fix that solves a real annoyance, and it’s worth enabling if you often unlock your laptop in the dark. If you’d rather not light up the room, keep it off and rely on your PIN. Either way, face sign-in with a backup is still a good mix of speed and safety.
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