Microsoft Windows 11 26H1 Update Version OS Build 28000.1575

KB5077179 updates Windows 11 version 26H1 to OS Build 28000.1575 with the latest security fixes, non-security improvements, and new features. It also includes servicing stack update KB5077868 and addresses graphics, WPA3-Personal Wi-Fi, BitLocker HLK, and TrustedInstaller issues.

• Includes the latest security fixes for Windows 11 version 26H1.
• Addresses a graphics-related system error on certain GPU configurations that could lead to KERNEL_SECURITY_CHECK_FAILURE.
• Fixes an issue that could cause TrustedInstaller to stop responding and prevent Windows from starting.

• Fixes a graphics issue affecting certain GPU configurations and dxgmms2.sys.
• Fixes connectivity issues preventing some devices from joining certain WPA3-Personal Wi-Fi networks.
• Fixes missing BitLocker HLK tests in the WHCP playlist.
• Fixes an issue where TrustedInstaller could stop responding and block Windows startup.

• Includes available new features in this cumulative update.
• Starting with Windows 11 version 26H1, .NET Framework 3.5 is no longer a Windows Feature on Demand optional component and must be installed using the standalone installer.

• Microsoft is not currently aware of any issues with this update.

• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• Includes servicing stack update KB5077868 for OS Build 28000.1575.
• AI components updated: Image Search, Content Extraction, Semantic Analysis, and Settings Model to version 1.2511.1224.0.

• .NET Framework 3.5 standalone installer
  https://go.microsoft.com/fwlink/?linkid=2348700

Product Information

Vendor: Microsoft

Product: Windows 11

Product type: Other

Application category: Utilities

Platform: Windows

Variant: 26H1

Version: OS Build 28000.1575

Vendor release date: Feb 10, 2026

Published on updatealert.io: Jun 3, 2026

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