Microsoft has released Windows 11 KB5061977 (OS Build 26100.4066) out-of-band update for Windows 11 24H2, introducing quality enhancements, including a resolution for an issue related to the direct send path for a guest physical address, as well as an improvement to the servicing stack, ensuring a stable and dependable installation of Microsoft updates.

May 27, 2025—KB5061977 (OS Build 26100.4066) Out-of-band

Improvements

This non-security update includes quality improvements. When you install this update:

• [Hyper-V Platform] Fixed: An issue in the direct send path for a guest physical address (GPA) where confidential virtual machines running on Hyper-V with Windows Server 2025 might intermittently stop responding or restart unexpectedly, affecting service availability and requiring manual intervention. This issue primarily affects  Azure confidential VMs.

Windows 11 servicing stack update (KB5058523)- 26100.4060

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see  Simplifying on-premises deployment of servicing stack updates.

May 27, 2025—KB5061977 (OS Build 26100.4066) Out-of-band - Microsoft Support