Windows 11 23H2 Update in January Disrupts Sleep Mode and Shutdown Features

Microsoft has officially recognized issues impacting devices operating on Windows 11 version 23H2 following the installation of security updates released in January 2026. Users of affected systems may experience functionality problems, specifically related to shutting down or entering sleep mode.

This situation has been documented within the Windows Release Health notes, where Microsoft states that after applying the January 13, 2026 security updates, systems with Secure Boot enabled may encounter difficulties, often restarting unexpectedly rather than shutting down or entering sleep. Secure Boot utilizes virtualization-based security measures to safeguard against firmware-level attacks at startup, making such issues particularly concerning.

Notably, the problematic update, tagged as KB5073455, is currently targeted exclusively at the Enterprise and IoT editions of Windows 11 version 23H2. The knowledge base entry addressing this issue suggests that the updates were intended to enhance Secure Boot certificates rather than affect the power management settings.

Possible Temporary Workaround

While users await a comprehensive solution, Microsoft has provided a temporary workaround for those facing shutdown issues. Affected users should access the command prompt by entering ‘cmd’ in the Start menu search and execute the following command:

shutdown /s /t 0

This command effectively forces the system to shut down immediately. However, it’s essential to note that there is currently no workaround available for entering sleep mode. Users should remember to save their work and manually shut down their devices after use to prevent unintended restarts or battery drainage.

Importantly, this marks the second issue Microsoft has acknowledged in relation to the updates from January Patch Day. Previous reports have also indicated that these updates may disrupt connectivity to Azure Virtual Desktop and Windows 365, impacting enterprise users who depend heavily on cloud-based Windows services.

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