Windows 11 23H2 Shutdown Issue After January Security Update
⚠️ Microsoft has confirmed that the January 13, 2026 cumulative update (KB5073455) can prevent some Windows 11, version 23H2 devices with System Guard Secure Launch enabled from shutting down or entering hibernation, causing them to restart instead. The issue is limited to Enterprise and IoT editions where the update is offered. Microsoft recommends the temporary workaround shutdown /s /t 0 for shutdowns and warns there is currently no hibernation workaround. Users should save work and perform manual shutdowns to avoid battery drain.
