New Delhi, June 17 -- If you have been relying on Windows Hello facial unlock to access your Windows 11 PC, you may have noticed that it no longer functions in the dark. This is a result of the Windows 11 update OS Build 26100.3775, which was released in April.

The update means that Windows 11 users can no longer unlock their PCs in low-light conditions unless their device has a webcam that supports colour cameras to see a visible face during sign-in. Here are the details.

As spotted by Windows Central, Microsoft now requires better security protocols to improve Windows Hello. In the Windows change log, Microsoft stated that post this update, or a later one, Windows now needs colour cameras to power Windows Hello.

"After installing thi...