KB5101684: Overview with user sentiment and feedback

Overview

KB5101684 is a cumulative preview update for Windows 11 versions 24H2 and 25H2, released on July 28, 2026, updating systems to OS builds 26100.8973 and 26200.8973. This non-security optional update includes 42 bug fixes and feature improvements designed for testing before integration into regular servicing cycles. The update is available through gradual and normal rollout phases.

General Purpose

• UI and File Explorer Enhancements: Improved file size display with appropriate units (KB, MB, GB), middle-click tab opening, thumbnail quality improvements, and eliminated grey flash on load
• Voice and Accessibility Features: Added Voice Isolation for Voice Access with Korean language support, improved Magnifier experience on touch devices, and enhanced Windows Hello with peripheral fingerprint sensor support
• System Reliability Improvements: Enhanced explorer.exe stability, improved Windows sign-in/lock screen reliability under low memory conditions, and better Start menu and taskbar startup performance
• Windows Update Optimization: Reduced restart requirements by consolidating eligible updates with monthly security patches, improved update progress calculation, and enhanced cleanup logic for better post-update performance
• Network and Storage Fixes: Improved DHCP renewal reliability, fixed DFS mapped drive file handling issues, and resolved SMB backup credential errors
• AI Component Updates: Updated Image Search, Content Extraction, Semantic Analysis, and Settings Model components to version 1.2607.840.0

General Sentiment

Community reception has been mixed. While the update introduces beneficial features and reliability improvements, a notable compatibility issue emerged with Cisco ISE Posture, where the Windows Update Agent version bump (1508 to 1509) caused posture assessment failures on managed systems. Users reported that organizations needed to carefully test preview updates against third-party security solutions before broader deployment. Microsoft's position that this is a preview update for vendor validation has merit, though the timing created friction for enterprises managing Cisco ISE environments.

Known Issues

• Cisco ISE Posture compatibility issue: Windows Update Agent version change from 1508 to 1509 caused posture assessment failures on systems running Cisco ISE 3.3.0.430 and Secure Client 5.1.13.177, requiring KB5101684 uninstallation to restore functionality

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 2026-08-18 07:12 PM

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