Microsoft Confirms Windows Hello Bug in Latest Security Update

The KB5055523 update disrupts login functionality for devices with advanced security features, with workarounds available but no permanent fix yet.

Microsoft's April 2025 security update, KB5055523, causes Windows Hello login issues on Windows 11 24H2 and Windows Server 2025 devices with certain security settings enabled.
The bug affects devices using Dynamic Root of Trust for Measurement (DRTM) or System Guard Secure Launch after performing a system reset with the 'Keep my Files' option.
Impacted users encounter error messages preventing PIN or facial recognition logins, such as 'Something happened and your PIN isn’t available.'
Microsoft has provided temporary workarounds, including re-enrolling PINs or facial recognition through system settings, but a permanent fix is still pending.
Other update-related bugs, including Credential Guard issues and safeguard holds for incompatible drivers, have been addressed, highlighting ongoing challenges with update stability.