KB5059091: Overview with user sentiment and feedback

Overview

KB5059091 is an out-of-band update released on April 16, 2025, addressing specific issues with Windows containers running in Hyper-V isolation mode. This update targets Windows 10 Enterprise LTSC 2019, Windows 10 IoT Enterprise LTSC 2019, Windows 10 IoT Core LTSC, and Windows Server 2019.

This non-security update focuses on quality improvements and specifically addresses compatibility issues between container system files and the hosting utility virtual machine (UVM). The update is particularly important for organizations using Windows containers in their infrastructure.

General Purpose

The primary purpose of this update is to resolve an issue where Windows containers running in Hyper-V isolation mode could fail to start in certain scenarios. The problem occurred when there was a mismatch between the container's update level and that of the hosting utility virtual machine (UVM). This mismatch caused compatibility problems between system files, leading to startup failures. The update ensures containers can correctly access necessary system files from the host, improving reliability and compatibility across different Windows versions.

Additionally, this update includes the latest servicing stack update (SSU) combined with the latest cumulative update (LCU), enhancing the overall reliability of the Windows update process. The servicing stack improvements help mitigate potential issues during future update installations.

General Sentiment

The general sentiment towards this update appears to be positive, as it addresses a specific technical issue affecting Windows containers in enterprise environments. The update is particularly relevant for organizations using Hyper-V isolation mode for their containers. Since this is an out-of-band release, it indicates Microsoft's responsiveness to addressing critical functionality issues outside the normal update cycle.

The inclusion of servicing stack improvements alongside the container fixes suggests a comprehensive approach to system maintenance and stability. However, as with any system update, organizations should follow their standard testing procedures before deployment.

Known Issues

• Devices with Citrix Session Recording Agent (SRA) version 2411 may experience installation issues
• Affected devices might initially download and apply the update but fail during restart
• Error message appears during installation completion
• System reverts to previous Windows updates
• Issue primarily affects organizations using Citrix SRA version 2411 (released December 2024)
• Home users are not expected to be affected by this issue

Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2025-05-02 12:37 AM

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