Win Update KB5041571 Windows 11 Cumulative Update build 26100.1457 (24H2) on Copilot+ PCs - Aug. 13

UPDATE 8/27:

August 13, 2024 - KB5041571 (OS Build 26100.1457)​

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types.

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

Highlights​

• This update addresses security issues for your Windows operating system.

Improvements​

This security update includes improvements that were a part of update KB5040529 (released July 23, 2024). Below is a summary of the key issues that this update addresses when you install this KB. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.

• [Lock screen] This update addresses CVE-2024-38143. Because of this, the “Use my windows user account” check box is not available on the lock screen to connect to Wi-Fi.
• [NetJoinLegacyAccountReuse] This update removes this registry key. For more information refer to KB5020276—Netjoin: Domain join hardening changes.
• [Secure Boot Advanced Targeting (SBAT) and Linux Extensible Firmware Interface (EFI)] This update applies SBAT to systems that run Windows. This stops vulnerable Linux EFI (Shim bootloaders) from running. This SBAT update will not apply to systems that dual-boot Windows and Linux. After the SBAT update is applied, older Linux ISO images might not boot. If this occurs, work with your Linux vendor to get an updated ISO image.
• [Domain Name System (DNS)] This update hardens DNS server security to address CVE-2024-37968. If the configurations of your domains are not up to date, you might get the SERVFAIL error or time out.

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 August 2024 Security Updates.

Windows 11 servicing stack update (KB5041575)- 26100.1440​

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​

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.


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 5041571.

For a list of the files that are provided in the servicing stack update, download the file information for the SSU (KB5041575) - version 26100.1440.






Check Windows Updates


UUP Dump:

64-bit ISO download:

ARM64 ISO download: