It only affected Enterprise and IoT editions of Windows 11 23H2, and an emergency fix is already available.
It only affected Enterprise and IoT editions of Windows 11 23H2, and an emergency fix is already available.
Microsoft released its first security update of 2026 for Windows 11 on January 13th. Just four days later, it was forced to release an emergency out-of-band update to fix some pretty serious bugs, the first one introduced.
The security patch was stopping some systems from shutting down or hibernating properly, and also preventing some users from logging in via remote desktop. The impact of the shutdown bug was limited to machines still running Windows 11 23H2, and only those running either the Enterprise of IoT editions. Still, this is just the latest buggy update that has forced Microsoft to issue an out-of-band update, something that used to be pretty rare, but seems to be becoming increasingly common.
According to the changelog:
Microsoft has identified issues upon installing the January 2026 Windows security update. To address these issues, an out-of-band (OOB) update was released today, January 17, 2026.
– Connection and authentication failures in remote connection applications: This issue affects multiple platforms including Windows 11, version 25H2; Windows 10, version 22H2 ESU; and Windows Server 2025. See the bottom of this message for the complete list of affected products.
-Devices with Secure Launch might fail to shut down or hibernate: This issue only affects Windows 11, version 23H2.
Update January 18th: Added context specifying that only Windows 11 23H2 was affected.
