Can't Shutdown? How to Fix the Windows 11 KB5073455 Shutdown Bug

Is your PC refusing to stay off? Microsoft's first Patch Tuesday updates of 2026 have introduced a frustrating bug that makes Windows 11 systems reboot instead of shutting down. It's a confusing situation for users who just want to turn off their machines for the day.

Understanding the Windows 11 KB5073455 Shutdown Bug

The issue stems from the January 13, 2026, security update ( KB5073455 ) for Windows 11 version 23H2. According to reports, the glitch specifically targets PCs configured with Secure Launch, a feature designed to protect firmware from malware.

Instead of entering a powered-down state or hibernation, the device simply restarts. Microsoft confirmed the bug in its knowledge base, noting that the conflict arises during the shutdown sequence when Secure Launch is active.

The Quick Fix: Installing Update KB5077797

Fortunately, you don't have to wait for next month's patch. Microsoft has released an out-of-band (OOB) update, KB5077797, to address the Windows 11 KB5073455 shutdown bug. This patch also resolves a secondary bug that caused sign-in failures for Remote Desktop connections.

Users can download the fix directly through Windows Update or the Microsoft Update Catalog. Installing it's highly recommended to restore normal power management functionality to your PC.