[German]The April 8, 2025 patch day has caused some collateral damage to Outlook, Excel and Word 2016. Some Windows users are also complaining that logging in via Windows Hello no longer works after installing the April 8, 2025 updates on Windows 11 24H2 and Windows Server 2025. Here is a brief overview of this problem and a workaround.
Security updates April 8, 2025
April 8, 2025 was patch day, and Microsoft has closed a number of vulnerabilities in Windows with security updates. An overview of the vulnerabilities can be found at Microsoft Security Update Summary (April 8, 2025). The updates for Windows clients are described in the blog post Patchday: Windows 10/11 Updates (April 8, 2025). Information on the server updates can be found in the article Patchday: Windows Server-Updates (April 8, 2025).
Windows Hello broken on Windows 11 24H2/ Server 2025
Microsoft has added another entry in the Know Issues for the cumulative update KB5055523 for Windows 11 24H2 and for the cumulative update KB5055523 for Windows Server 2025 (noticed by colleagues here). It states that Microsoft is aware that there is a problem with Windows Hello. This problem occurs on devices with certain security features enabled.
Sign in via Hello fails
After installing this update and performing a keystroke reset or resetting the computer under Settings > System > Recovery and selecting the Keep my files and install locally option, some users may not be able to sign in to their Windows services using Windows Hello facial recognition or PIN. Windows Hello broken on Windows 11 24H2/ Server 2025
You may see a Windows Hello message that says: "Something happened and your PIN isn't available. Click to set up your PIN again" or "Sorry something went wrong with face setup".
Error only under certain conditions Sign in via Hello fails
This issue only affects devices that have System Guard Secure Launch or the Dynamic Root of Trust for Measurement (DRTM) feature enabled after installing this update. Devices that had Secure Launch or DRTM enabled or disabled prior to this update are not affected by this issue.
A workaround
To log in with a PIN, according to Microsoft, you should carry out the following steps when the prompt Set my PIN appears on the login screen to log in to Windows Hello again.
- To use Face Logon, re-enroll in Windows Hello Facial recognition go to Settings > Accounts > Sign-in options > Facial recognition (Windows Hello), and select Set up. Follow the on-screen instructions.
Is anyone affected by this exotic bug and does the workaround work?
Similar articles:
Microsoft Security Update Summary (April 8, 2025)
Patchday: Windows 10/11 Updates (April 8, 2025)
Patchday: Windows Server-Updates (April 8, 2025)
Patchday: Microsoft Office Updates (April 8, 2025)
Word/Excel 2016 crashing after April 2025 update KB5002700
Outlook 2016: Calendar access blocked after April 2025 update KB5002700
