Microsoft’s April 2025 patch tightened Windows Hello’s security but, as a side effect, face unlock can no longer operate in total darkness. Here’s a clear breakdown of what changed, how you can work around it today, and what’s coming next.
Windows Hello in the Dark: The Security Trade-off
In April 2025, Microsoft released a patch that stops Windows Hello face recognition from working in complete darkness. After a spoofing vulnerability was discovered, the system now requires both IR and visible-light cameras to authenticate—meaning no light, no unlock.
Quick Workarounds to Restore Dark-Room Unlock
- Disable Your Webcam
By turning off your RGB webcam in Device Manager, Windows Hello reverts to IR-only mode and lets you unlock in the dark—though you’ll lose camera access for video calls. - Add a Little Light
A simple desk lamp or even your screen’s glow can satisfy the visible-camera requirement. - Use a Dedicated IR Webcam
An external IR-only cam certified for face unlock can bring back dark-room logins without blocking video apps.
Community & Expert Reactions
Windows users across forums confirm the change: face unlock just stops without light. Some report “disabling the camera works perfectly” again :contentReference[oaicite:0]{index=0}. Security experts praise the change, emphasizing that combining IR and RGB prevents spoofing attacks. Device admins are divided between strict security and user convenience.
What’s Next for Facial Recognition on Windows
Microsoft hasn’t reversed the change, but future improvements might include:
- On-device AI fusion to better handle dark-light IR+RGB data
- Enhanced low-light sensors in upcoming Surface devices or OEMs
- Alternative biometrics promoted for no-light scenarios, like fingerprint or passkeys
Conclusion
Windows Hello’s dark-room limitation is a deliberate security upgrade—even if it costs some user convenience. For now, workarounds like disabling the webcam or adding a light source can restore functionality. Keep your system updated and stay tuned for future refinements.
Question for you: Which fix will you use at night—lamp, IR-only cam, or just switch to PIN? Let me know in the comments!