Patch Tuesday leaves some users unable to login to Windows

Updated Those keen to get their Microsoft PCs patched up as soon as possible have been getting an unpleasant shock when they try to get in using Windows Hello. The patch bundle released yesterday is going to cause problems for a specific subset of users who are running either System Guard Secure Launch or Dynamic Root of Trust for Measurement (DRTM) on Windows 11 and Server 2025. If that's you, it's possible you'll need to reset your login PIN or biometrics in Hello in order to actually login and use your computer. "We're aware of an edge case of Windows Hello issue affecting devices with specific security features enabled," Microsoft said in an advisory. "After installing this update and performing a Push button reset or Reset this PC from Settings > System > Recovery and selecting Keep my Files and Local install, some users might be unable to login to their Windows services using Windows Hello facial recognition or PIN. Users might observe a Windows Hello message saying 'Something happened and your PIN isn't available. Click to set up your PIN again' or 'Sorry something went wrong with face setup.'" The dodgy security patch causing the issues is KB5055523, dated April 8, which fixes up various Windows 11 and Server 2025 vulnerabilities including the privilege-elevating CVE-2025-29824, which is being exploited in the wild by ransomware. That KB includes KB5053656, which was made available on March 27. There are a few other bugs in that release, such as issues with Citrix and...