August 27, 2024—KB5041865 (OS Build 26100.1591) Preview (2024)

Windows 11 version 24H2, all editions More...Less

Release Date:

8/27/2024

Version:

OS Build 26100.1591

Forinformation about Windows update terminology, see the articleabout thetypes of Windows updatesand themonthly quality update types.

NoteFollow@WindowsUpdateto 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

Gradual rollout

These might not be available to all users because they will roll out gradually.

Improvements

This non-security update includes quality improvements. 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.

  • [FrameShutdownDelay] The browser ignores its value in the “HKLM\SOFTWARE\Microsoft\Internet Explorer\Main” registry key.

  • [Domain Name System (DNS)] A deadlock occurs in the domain controller (DC) when it starts up in the DNS client.

  • [OpenSSH] This update adds a prompt that asks you to confirm when you turn on OpenSSH using the Server Manager UI.

  • [Unified Write Filter (UWF) and Microsoft System Center Configuration Manager (SCCM)] An SCCM task to re-enable UWF fails because of a deadlock in UWF. This stops the device from restarting when you expect it.

  • [vmswitches] They fail to enumerate using Get-VMSwitch command. ​​​​​​​

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

Windows 11servicing stack update (KB5042114) - 26100.1591

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

Microsoft is not currently aware of any issues with 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 updatesandServicing Stack Updates (SSU): Frequently Asked Questions.

Install this update

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

Windows UpdateBusinessCatalogServer Update Services

Available

Next Step

Yes

Go toSettings>Update & Security>Windows Update. In theOptional updates availablearea, you will find the link to download and install the update.

Available

Next Step

No

None. These changes will be included in the next security update to Windows Update for Business.

Available

Next Step

Yes

To get the standalone package for this update, go to theMicrosoft Update Catalogwebsite.

Available

Next Step

No

You can import this updateinto Windows Server Update Services (WSUS) manually. See theMicrosoft Update Catalogfor instructions.

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 nameby 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 thefile information for cumulative update 5041865.

For a list of the files that are provided in the servicing stack update, download thefile information for the SSU (KB5042114) - version 26100.1591.

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