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June 15, 2024—KB5039239 (OS Build 26100.863)

Applies To

Windows 11 version 24H2, all editions

Note

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types.
Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.

Important

Windows 11, version 24H2 is targeting Copilot+ PCs devices and devices that were previously using Windows Insider 24H2 builds.

Highlights

This update addresses an issue that affects the audio for a Bluetooth device. When you connect it, the volume is set to maximum.
This update addresses an issue that might stop games that have BattlEye anti-cheat from working. This issue applies to Arm64 devices.
We are advancing the Copilot experience on Windows. It is now pinned to the taskbar and will behave like an app. This gives you the benefits of a typical app experience. For example, you can do things like resize, move, and snap the window.

Improvements

This security update includes improvements. When you install this KB:

This update affects the Windows Management Instrumentation Command line (WMIC). The default state of Feature on Demand (FoD) for new installations is “Disabled.” If you upgrade to Windows 11, version 24H2, the default state of FoD is “Enabled.”
Starting in this update, File Explorer adds the Mark of the Web (MoTW) tag to files and folders that come from untrusted locations. When MapUrlToZone classifies a file as “Internet,” that file also gets this tag. Because of this change, the “LastWriteTime” time stamp is updated. This might affect some scenarios that rely on file copy operations.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.

For more information about security vulnerabilities, please refer to the Security Update Guide website and the June 2024 Security Updates.

Windows 11 servicing stack update (KB5039332)- 26100.840

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

Known issues in this update

Applies to	Symptom	Workaround
All users	We’re aware of an issue where players on Arm devices are unable to download and play Roblox via the Microsoft Store on Windows.	Players on Arm devices can play Roblox by downloading the title directly from www.Roblox.com.

How to get this update

Before you install this update

Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.

Windows Update
Business
Catalog
Server Update Services

Available	Next Step
Yes	None. This update will be downloaded and installed automatically from Windows Update and Microsoft Update.

Available	Next Step
Yes	None. This update will be downloaded and installed automatically from Windows Update for Business in accordance with configured policies.

Available	Next Step
Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.

Available	Next Step
Yes	This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows: Product: Windows 11 Classification: Security Updates

Note

If you want to remove the LCU
To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5039239.

For a list of the files that are provided in the servicing stack update, download the file information for the SSU (KB5039332) - version 26100.840.