Microsoft siger, at en Windows-opdateringsfejl kan forhindre nedlukning – hvad der er berørt, og løsningen

Microsoft har udvidet vejledningen om en Windows-nedlukningsfejl, der blev udløst af opdateringer fra januar 2026, og bekræfter, at den påvirker flere systemer end først rapporteret. Ifølge BleepingComputer kan problemet få nogle enheder til at genstarte i stedet for at lukke ned eller gå i dvaletilstand, når specifikke sikkerhedskonfigurationer er aktiveret.

For de fleste brugere ser symptomet ud som "min pc vil ikke lukke ned." For IT-teams er det virkelige problem kompatibiliteten mellem sikkerhedsfunktioner, der er afhængige af virtualisering, og opdateringsstien.

Hvad sker der på de berørte maskiner

BleepingComputer rapporterer, at nogle Secure Launch-kompatible pc'er med Virtual Secure Mode (VSM) aktiveret ikke kan lukke ned eller gå i dvale efter installation af visse opdateringer; i stedet genstarter systemet.

Dette er ikke bare irriterende. Det kan:

  • Reparation af brud og vedligeholdelsesvinduer
  • Forvirre strømstyringspolitikker
  • Øget slid (uventede genstarter)
  • Efterlad systemer i uventede tilstande for krypterings- og compliance-arbejdsgange

Hvilke Windows-versioner og opdateringer er involveret

Pr. BleepingComputer:

  • Windows 11 23H2-systemer med KB5073455 installeret (og System Guard Secure Launch aktiveret) blev identificeret som berørte.
  • Microsoft udsendte kort efter out-of-band (OOB) opdateringer for at løse den specifikke sag.
  • Microsoft opdaterede senere sit dashboard for at bekræfte lignende adfærd på Windows 10 22H2 og visse Windows 10 Enterprise LTSC-versioner, når VSM er aktiveret efter installation af opdateringer, herunder KB5073724 og KB5078131.

Hvad er VSM, og hvorfor er det med i historien?

VSM (Virtual Secure Mode) bruger hardwarevirtualisering til at oprette en isoleret "sikker kerne"-region, der beskytter følsomme aktiver som:

  • Akkreditiver
  • Krypteringsnøgler
  • Sikkerhedstokens

Det understøtter funktioner som Credential Guard og Hypervisor-Protected Code Integrity.

Fordi VSM ændrer, hvordan operativsystemet interagerer med lavniveaukomponenter (opstart, hukommelsesisolering, hypervisor), kan fejl i opdateringsstien dukke op specifikt på maskiner med disse beskyttelser aktiveret.

Den løsning, som Microsoft anbefaler

BleepingComputer rapporterer, at Microsoft rådede berørte kunder til manuelt at lukke ned ved hjælp af:

  • nedlukning /s /t 0

Dette gennemtvinger en direkte kommandosti til nedlukning og kan hjælpe, indtil en løsning leveres via en fremtidig opdatering.

For organisationer kan denne løsning udarbejdes via scripts eller pushes via administrationsværktøjer, men det er stadig et plaster på løsningerne.

Hvad IT-teams bør gøre nu

  1. Tjek hvilke flåder der har Secure Launch eller VSM aktiveret(disse kan være begrænset til bestemte modeller eller virksomhedsbilleder).
  2. Bekræft installerede opdaterings-KB'erog matche Microsofts statusnoter for udgivelsen.
  3. Implementer OOB-opdateringer, hvor det er relevantog validere nedluknings-/dvaletilstandsadfærd.
  4. Kommunikér brugervejledning(inklusive kommandolinjeløsningen) for at reducere støj fra helpdesk.

Konklusion

Windows-nedlukningsfejlen er en påmindelse om, at stærkere sikkerhedsfunktioner kan introducere mere komplekse interaktioner med opdateringer. Hvis dine enheder bruger Secure Launch eller VSM, skal du nøje følge Microsofts sundhedsråd om udgivelser – og bruge løsningen med shutdown-kommandoen, indtil den permanente løsning udsendes.


Kilder

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Microsoft says a Windows update bug can prevent shutdown—what’s affected and the workaround
Microsoft confirmed a January update bug that can cause affected Windows 10/11 PCs to restart instead of shutting down or hibernating when certain security features are enabled. Here’s what’s impacted, why VSM matters, and what to do.
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Microsoft says a Windows update bug can prevent shutdown—what’s affected and the workaround
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Microsoft has expanded guidance on a Windows shutdown bug triggered by January 2026 updates, confirming it affects more systems than first reported. According to BleepingComputer, the issue can cause some devices to restart instead of shutting down or entering hibernation when specific security configurations are enabled.
For most users, the symptom looks like “my PC won’t shut down.” For IT teams, the real issue is compatibility between security features that rely on virtualization and the update path.
What’s happening on affected machines
BleepingComputer reports that after installing certain updates, some Secure Launch-capable PCs with Virtual Secure Mode (VSM) enabled are unable to shut down or hibernate; instead, the system restarts.
This isn’t just annoying. It can:
Break patching and maintenance windows
Confuse power-management policies
Increase wear (unexpected reboots)
Leave systems in unexpected states for encryption and compliance workflows
Which Windows versions and updates are involved
Per BleepingComputer:
Windows 11 23H2 systems with KB5073455 installed (and System Guard Secure Launch enabled) were identified as affected.
Microsoft issued out-of-band (OOB) updates shortly after to address that specific case.
Microsoft later updated its dashboard to confirm similar behavior on Windows 10 22H2 and certain Windows 10 Enterprise LTSC versions when VSM is enabled after installing updates including KB5073724 and KB5078131.
What is VSM and why it’s in the story
VSM (Virtual Secure Mode) uses hardware virtualization to create an isolated “secure kernel” region, protecting sensitive assets like:
Credentials
Encryption keys
Security tokens
It underpins features such as Credential Guard and Hypervisor-Protected Code Integrity.
Because VSM changes how the OS interacts with low-level components (boot, memory isolation, hypervisor), bugs in the update path can show up specifically on machines with these protections enabled.
The workaround Microsoft recommends
BleepingComputer reports that Microsoft advised affected customers to manually shut down using:
shutdown /s /t 0
This forces a direct shutdown command path and can help until a fix is delivered via a future update.
For organizations, that workaround can be scripted or pushed via management tools, but it’s still a band-aid.
What IT teams should do now
Check which fleets have Secure Launch or VSM enabled
(these may be limited to certain models or enterprise images).
Confirm update KBs installed
and match against Microsoft’s release-health notes.
Deploy OOB updates where applicable
and validate shutdown/hibernate behavior.
Communicate user guidance
(including the command-line workaround) to reduce helpdesk noise.
Bottom line
The Windows shutdown bug is a reminder that stronger security features can introduce more complex interactions with updates. If your devices use Secure Launch or VSM, track Microsoft’s release-health advisories closely—and use the shutdown command workaround until the permanent fix ships.
Sources
https://www.bleepingcomputer.com/news/microsoft/microsoft-january-update-shutdown-bug-affects-more-windows-pcs/
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