Windows 11 24H2: Microsoft Releases Update KB5065426 (Build 26100.6584)

Microsoft has officially released the Windows 11 24H2 cumulative update KB5065426 (Build 26100.6584), available starting September 9, 2025, through Windows Update.

This patch introduces new features across the lock screen, Windows Hello, search, widgets, and more, alongside a substantial set of fixes and performance improvements.

Most of these additions were already included in the optional preview update KB5064081 (released on August 29, 2025), so users who installed that build will already have many of these changes.

Table of Contents

What’s New in KB5065426

AI & Productivity

Recall now opens on a personalized home page, featuring recent snapshots plus main apps and websites.
New filters let you decide which apps and sites are included in captures.
A redesigned sidebar provides quick access to Home, Timeline, Comments, and Settings.
Click-to-Do introduces an interactive tutorial with text and image actions (e.g., summarizing content or removing backgrounds).

Interface & User Experience

System permission dialogs have been redesigned: the background dims and notices appear centered for greater privacy visibility.
Taskbar now shows a clock with seconds in the notification center (enable via Settings > Time & Language > Date & Time). A bug that could break “Preview” when hovering over thumbnails is now fixed.
Search bar improvements: new grid view for faster image recognition plus state indicators (ongoing indexing, cloud vs. local).
Widgets on lock screen now support full customization (add, remove, reorder sports, traffic, weather, watchlist, etc.). Initially rolled out in EEA regions, now global. Settings under Personalization > Lock Screen.
File Explorer:
- Context menus now include separators.
- Person cards (with Microsoft 365 account ID integration) appear in “Activity” and “Recommended.”
- Fixed an issue where files stayed locked even after “Unlock” in properties.
Windows Hello: unified interface across login, PasskeysRecall, and Microsoft Store. Improved face recognition reliability and stronger fingerprint sign-in after sleep.
Settings:
- Redesigned activation/expiration notices with Windows 11 design language.
- New panel at Privacy & Security > Text & Image Generation lets users monitor/block apps using generative AI models.
- Copilot+ PC setup agent expanded to AMD and Intel devices (available in English initially).
- Fixed closing issues when adding security keys.
Task Manager: default CPU metric updated to industry standards; users can switch back by enabling the CPU Utility column under Details.
Widgets: multiple boards supported and a redesigned Discover tab powered by Copilot with curated stories (summaries, videos, and images).
Windows Backup for Organizations: now generally available for enterprise device deployment and restoration.
PowerShell 2.0: deprecated and removed starting August 2025. Only PowerShell 5.1 and 7.x remain.

Bug Fixes & Quality Improvements

Live Captions: added opacity controls.
UAC & MSI Repairs: fixed unexpected prompts tied to security flaw CVE-2025-50173.
Input & Keyboard:
- Fixed IME Chinese bug where the first character after Ctrl+C didn’t display.
- Addressed crashes in textinputframework.dll affecting apps like Quick Notes.
- Fixed issues where apps stopped responding under certain input scenarios.
- Modules in IIS Manager no longer disappear unexpectedly.
dbgcore.dll: resolved process crashes, including Explorer.exe.
Kerberos: prevented crashes when accessing cloud-shared resources.
Login: fixed blank screen and “Please wait a moment” hangs.
Miracast: resolved audio cutouts after a few seconds on some devices.
Audio: improved resilience to service hangs and eliminated stuttering in NDI-enabled apps when Display Capture is active in OBS Studio.
Cryptography (Pluton): fixed Event 57 errors (“the provider could not be initialized”).
Device Management: solved conflicts with shared files blocking recovery features.
File System (ReFS): fixed memory exhaustion when handling large files.
IME/Touch Keyboard:
- Extended Chinese IME characters no longer appear as blank boxes.
- Fixed crashes with ChangJie, Bopomofo, and Japanese IMEs when rolling back versions.
Performance (ARM64): fixed installer delays when installing applications.
SMB Client Compatibility Audit: new feature detects incompatible devices/software before applying Extended Protection for Authentication (EPA) policies. (See CVE-2025-55234 for details.)
Component Updates: Image Search, Content Extraction, Semantic Analysis, and Settings Model updated to v1.2508.906.0.
SSU: includes KB5064531 (servicing stack improvements for reliable update installation).

Important Notices

Secure Boot Certificate Expiration: Current certificates will expire in June 2026. Microsoft recommends planning migrations/updates to avoid startup issues.