KB5079391: Overview with user sentiment and feedback

Overview

KB5079391 is a non-security preview cumulative update released on March 26, 2026, for Windows 11 versions 24H2 and 25H2 (OS Builds 26200.8116 and 26100.8116). This optional update delivers production-quality improvements and introduces several new features alongside reliability enhancements across multiple system components. The update was designed to be rolled out gradually to users, allowing features to reach devices over time rather than all at once.

However, shortly after its initial release, Microsoft identified a critical installation issue affecting the update's deployment. The issue manifested as error code 0x80073712, preventing successful installation on affected devices. In response, Microsoft halted the rollout of KB5079391 and subsequently released an out-of-band replacement update (KB5086672) on March 31, 2026, which includes all the improvements from KB5079391 along with a fix for the installation problem. This situation represents a significant quality control issue that impacted the update's availability and user experience.

General Purpose

KB5079391 introduces multiple enhancements focused on improving user experience and system reliability across Windows 11. The update enables Smart App Control to be toggled on and off without requiring a clean installation, providing users with greater flexibility in managing application security settings. Narrator functionality has been expanded to provide rich image descriptions on Copilot+ PCs and now integrates with Copilot across all Windows 11 devices, enhancing accessibility features. The Settings interface receives modernization improvements, including a restructured About page with clearer device specifications and an improved device information card on the Settings Home page.

File Explorer receives reliability improvements, allowing users to more reliably unblock downloaded files for preview purposes and enabling Voice Typing during file renaming operations. Display handling has been enhanced to support monitors reporting refresh rates exceeding 1000 Hz, improved USB4 monitor connections for better battery efficiency during sleep states, and enhanced HDR reliability for non-compliant displays. The update addresses Windows Hello Fingerprint reliability for certain devices and improves Windows Recovery Environment stability when running x64 applications on ARM64 devices. Additionally, the update fixes a critical issue where updates installed using Windows Update Standalone Installer would fail with ERROR_BAD_PATHNAME when executed from network shares containing multiple MSU files.

General Sentiment

Community sentiment regarding KB5079391 is decidedly negative, primarily due to the installation failure issue that emerged shortly after release. While the update's feature set received modest appreciation from users interested in accessibility improvements and Smart App Control flexibility, the critical 0x80073712 installation error overshadowed any positive reception. Users expressed frustration with Microsoft's quality assurance processes, particularly given the pattern of problematic updates in recent months.

The decision to halt rollout and subsequently release a replacement update (KB5086672) was viewed as necessary but also indicative of recurring quality concerns within Windows update cycles. Some users noted that manual installation from the Microsoft Update Catalog appeared to work for certain devices, suggesting the issue may have been environment-specific rather than universal. However, this workaround was not widely publicized, leaving many users confused about why they were not receiving the update or why it was failing when attempted. The gradual rollout approach, while intended to minimize impact, was criticized by users who felt it created artificial delays in feature availability. Overall, the update demonstrates both positive feature development and concerning execution problems that undermined confidence in the release.

Known Issues

• Installation failure with error code 0x80073712 on affected devices, with error message stating "Some update files are missing or have problems. We'll try to download the update again later"
• Update rollout was temporarily paused and limited availability through Windows Update due to the installation issue
• Issue addressed in replacement out-of-band update KB5086672 released March 31, 2026
• Supplemental font installation failures reported by some users following installation
• Update no longer offered to new devices following identification of the installation 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 2026-04-30 01:33 PM

Back to Knowledge Base Catalog