Microsoft's Windows Hello face unlock feature was altered in April to improve security by addressing a vulnerability related to spoofing. This change means the system now requires visible light to function, disabling its use in dark conditions. Although a workaround exists by disabling the camera, this compromises its use in other applications, making it less practical for users who rely on video calling. Microsoft clarified this security adjustment impacts functionality yet is deemed necessary to protect users against potential exploits, which have not been publicly disclosed or exploited.
"After installing this update or a later Windows update, for enhanced security, Windows Hello facial recognition requires color cameras to see a visible face when signing in."
"Fixing the security flaw has now removed key functionality from Windows Hello in Windows 11."
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