Microsoft Windows 11 26H1 Update Version OS Build 28000.2340

KB5095091 updates Windows 11 version 26H1 to OS Build 28000.2340 with quality improvements, new AI-related UI features, and fixes for File Explorer, Windows Hello, USB, and more. It also includes a known issue affecting Microsoft Office launches from some third-party apps. Reference IDs: KB5101277.

• Improves Netlogon secure channel connections between domain controllers, helping member servers connect successfully to pre-2025 domain controllers.
• Reduces unexpected authentication blocks in Windows Hello Enhanced Sign in Security by resolving missing secure enrollment metadata.

• Fixes File Explorer so the OneDrive shortcut works when File Explorer is run in administrative mode.
• Improves Task Manager CPU speed display for VMs after resuming from hibernate.
• Improves reliability of desktop app shortcut loading.
• Fixes Windows Push Notification Services hangs that could affect Outlook and other apps.
• Fixes the Recycle Bin confirmation dialog showing an internal file name instead of the original name after permanent deletion.
• Improves Windows reliability on sign-in and lock screens, in File Explorer, with touch gestures, and when changing themes.
• Improves USB4 dock and hub display reliability, especially when resuming from standby.
• Improves USB3 resiliency and recovery against certain hardware faults.
• Improves touch keyboard, input switcher, and clipboard history responsiveness.
• Improves Microsoft Store download performance, bandwidth usage, and error reporting.
• Improves BitLocker testing reliability for the USB BIOS Logo Test.

• Magnifier now provides clearer screen reader announcements and supports magnification of permitted protected content.
• Task Manager adds optional NPU, NPU Engine, NPU memory, and Isolation columns, plus improved GPU neural engine visibility.
• Windows 11 Camera settings now support Multi-App Camera and Basic Camera modes, configurable by Group Policy.
• Windows Setup now lets you choose a custom user folder name during setup.
• Windows Search now finds and prioritizes files with as few as two characters.
• The emoji panel now uses GIPHY for GIF content instead of Tenor.
• Dev Drive creation and volume resizing now support specifying size in gigabytes.
• Task Scheduler now saves column width adjustments across sessions.

• Microsoft Office applications might fail to open from certain third-party apps that use OLE automation after updates released on or after June 9, 2026.
• Affected users may need to open Office apps or documents directly instead of from the third-party application.

• Gradual rollout features may not be available on all devices immediately.
• The emoji panel will require the latest Windows update after June 30, 2026 to continue using GIFs.
• Installing earlier updates means only new changes in this package will be downloaded and installed.
• The update includes AI components version 1.2605.856.0 and SSU KB5101277 (Build 28000.2263).
• Enterprise admins can configure Camera modes through Group Policy under Computer Configuration > Administrative Templates > Windows Components > Camera > Configure Camera Options.
• If the Office launch issue affects your organization, Microsoft Support for business can provide a workaround.

Product Information

Vendor: Microsoft

Product: Windows 11

Product type: Software

Application category: Utilities

Platform: Windows

Variant: 26H1

Version: OS Build 28000.2340

Vendor information published: Jun 23, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jun 23, 2026

Description: Client operating system for modern desktop and enterprise environments.