Windows 11 Shutdown Bug Emerges After January Patch
TL;DR Summary
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.
- 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
Reading Insights
Total Reads
0
Unique Readers
4
Time Saved
52 min
vs 53 min read
Condensed
99%
10,568 → 87 words
Want the full story? Read the original article
Read on Cyber Security News