Windows 11 PCs Struggle to Shut Down Post-January Security Update

Taylor Keatsman

ago 2 hours

Windows 11 PCs Struggle to Shut Down Post-January Security Update

Windows 11 users are experiencing a significant issue following the January 13, 2026, security update. The update has been linked to troubled shutdown and hibernation processes, causing affected PCs to restart instead.

Root Cause of the Shutdown Issues

The problems stem from security update KB5073455, which specifically targets OS Build 22621.6491 for Windows 11 version 23H2. This update was first noted on January 15 and is associated with a conflict involving the Secure Launch feature.

Secure Launch is a component of the virtualization-based security (VBS) framework within Windows. It is designed to ensure that boot processes are safeguarded against firmware threats, such as rootkits. This feature, part of Windows’ System Guard suite, evaluates the firmware environment during startup using hypervisor-protected code integrity.

Impact on Affected Systems

The shutdown problem is primarily affecting the Enterprise and IoT editions of Windows 11 version 23H2. Fortunately, consumer variants like Home and Pro remain unaffected. Server platforms, including Windows Server, are also experiencing no disruptions.

The issue arises when Secure Launch is enabled.
Common in high-security enterprise environments, this setup is critical for compliance with standards like NIST.
Reports indicate that enterprises in sectors like finance and government are significantly impacted.

Consequences of the Bug

Although this glitch is not a direct vulnerability, it poses risks. PCs caught in reboot loops can deplete batteries more rapidly, increasing the likelihood of data loss and security issues due to prolonged uptime without patches.

Temporary Fixes and Future Updates

Microsoft has provided a temporary resolution for the shutdown issue through the Command Prompt. Users can execute the command shutdown /s /t 0 to force an immediate shutdown, bypassing the graphical user interface failure. However, there is no current workaround for hibernation.

To avoid unexpected data loss due to power issues, users are encouraged to save their work and perform full shutdowns. Microsoft is expected to release a proper fix in a future update and has recommended that IT teams keep a close eye on Windows Update channels for more information.

Disabling Secure Launch through Group Policy can restore standard functions but compromises boot integrity.
The decision to disable this feature should be weighed against the risks associated with potential firmware attacks.

This incident highlights the complexities involved in monthly Patch Tuesday updates. While these updates aim to enhance security, they can inadvertently introduce new challenges, emphasizing the importance of staged testing in security-sensitive environments.

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