Technology Microsoft: Some Windows PCs fail to shut down after January update

Brownie2019

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Microsoft has confirmed a new issue that prevents Windows 11 23H2 devices with System Guard Secure Launch enabled from shutting down.
System Guard Secure Launch is a Windows security feature designed to protect the boot process from firmware-level attacks and malware such as rootkits.
According to a release health dashboard update on Thursday, this known issue affects only systems running Enterprise and IoT Windows editions with the KB5073455 cumulative update installed.
"After installing the January 13, 2026, Windows security update (KB5073455) for Windows 11, version 23H2, some PCs with Secure Launch are unable to shut down or enter hibernation. Instead, the device restarts," Microsoft explained in a Windows release health dashboard update on Thursday.
More here:
 
More bugs with Jan update

Thank you for sharing this information. I'm using Outlook with POP so I would probably be affected. Will wait with update until they fix an issue.

I also had a feeling that this month's update could cause some problems so I paused them for 5 weeks. Now I'm hoping that MS will fix them before February.
 
Thank you for sharing this information. I'm using Outlook with POP so I would probably be affected. Will wait with update until they fix an issue.

I also had a feeling that this month's update could cause some problems so I paused them for 5 weeks. Now I'm hoping that MS will fix them before February.
I have applied the update once released, but I am on 24h2 and with the minimal number of apps; no outlook, only Word, PowerPoint, and Excel.
 
Thank you for sharing this information. I'm using Outlook with POP so I would probably be affected. Will wait with update until they fix an issue.

I also had a feeling that this month's update could cause some problems so I paused them for 5 weeks. Now I'm hoping that MS will fix them before February.
I have just found out that the Jan update is 4 GB!
 
Seems to affect those who enabled secure boot only.
I wish that was true, I have secure boot off, updates delayed for a week, guess that is not safe enough, maybe 6 months would be better.

I thought I'd done something to my PC, was searching all over, wasted a day on this. Thought I was going crazier, than I already am.
 
I wish that was true, I have secure boot off, updates delayed for a week, guess that is not safe enough, maybe 6 months would be better.

I thought I'd done something to my PC, was searching all over, wasted a day on this. Thought I was going crazier, than I already am.
You are right; System Guard Secure Launch is not the Secure Boot

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