Windows 11 Shutdown Bug Emerges After January Patch
TL;DR
Microsoft’s January 13, 2026 security update KB5073455 for Windows 11 23H2 (OS Build 22621.6491) triggers a shutdown bug on Enterprise and IoT editions, causing devices to reboot instead of powering down or entering hibernation due to interference with Secure Launch (a virtualization-based security feature). IT teams report power-management issues and potential data loss; a workaround is to force shutdown via shutdown /s /t 0, while a fix is promised in a future update. Disabling Secure Launch via Group Policy can restore normal shutdown but weakens boot integrity.
Topics:technologycyber-security-news#cyber-security-news#secure-launch#security-update#shutdown-bug#vbs#windows-11
- Windows 11 PCs Fail to Shut Down After January Security Update Cyber Security News
- Patch Tuesday update makes Windows PCs refuse to shut down theregister.com
- ‘Fail To Shut Down’—Microsoft Issues Windows Update Warning Forbes
- Microsoft confirms some Windows 11 PCs can't shut down, hibernate after latest Patch Tuesday Neowin
- Don't update your Windows PC in January, or you won't be able to shut it down PhoneArena
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