On January 19, 2026, Microsoft released unscheduled security and stability updates for Windows 11 in response to significant errors that emerged after routine updates, which affected system functionality. Users reported issues with shutting down, hibernation failures, and authentication challenges with Remote Desktop and other remote applications. Microsoft rolled out out-of-band updates KB5077744 and KB5077797 to address these problems, impacting Windows 11 version 25H2, Windows 10 version 22H2, and Windows Server 2025. The updates also fix issues related to improper shutdowns and unreliable hibernation in Windows 11 version 23H2 when the Secure Launch feature is enabled. Recent incidents are part of a pattern of update-related challenges across various Windows versions, leading to criticism of the quality assurance processes for Windows updates.