February 13, 2024—KB5034765 (OS Builds 22621.3155 and 22631.3155)

UPDATED 2/27/24
IMPORTANT: New dates for the end of non-security updates for Windows 11, version 22H2The new end date is June 24, 2025 for Windows 11, version 22H2 Enterprise, Education, IoT Enterprise, and Enterprise multi-session editions. Home, Pro, Pro Education, and Pro for Workstations editions of version 22H2 will receive non-security preview updates until June, 26, 2024. After these dates, only cumulative monthly security updates will continue for the supported editions of Windows 11, version 22H2. The initial date communicated for this change was February 27, 2024. Based on user feedback, this date has been changed so more customers can take advantage of our continuous innovations.

For information about Windows update terminology, see the article about the types of Windows updates and the monthly quality update types. For an overview of Windows 11, version 23H2, see its update history page. NoteFollow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.

Highlights

• New! The Copilot in Windows icon now appears on the right side of the system tray on the taskbar. Also, the display ofShow desktopat the rightmost corner of the taskbar will be off by default. To turn it back on, go toSettings>Personalization>Taskbar. You can alsoright-click the taskbar and chooseTaskbar settings.Note Windows 11 devices will get this new functionality at different times. Some of these new features roll out gradually using controlled feature rollout (CFR) to consumers.
• This update addresses security issues for your Windows operating system.

Improvements

**Note:**To view the list of addressed issues, click or tap the OS name to expand the collapsible section.

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Windows 11, version 23H2

**Important:**Use EKB KB5027397 to update to Windows 11, version 23H2.

This security update includes quality improvements. Key changes include:

• This build includes all the improvements in Windows 11, version 22H2.
• No additional issues are documented for this release.

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Windows 11, version 22H2

This security update includes improvements that were a part of update KB5034204 (released January 23, 2024). When you install this KB:

• This update addresses an issue that affects Narrator announcements. They are slow when you use Natural Voices.
• This update addresses an issue that affects explorer.exe. It might stop responding. This occurs when you restart or shut down a PC that has a controller accessory attached to it.
• This update addresses an issue that affects the download of device metadata. Downloads from the Windows Metadata and Internet Services (WMIS) over HTTPS are now more secure.
  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 February 2024 Security Updates.

Windows 11 servicing stack update - 22621.3073 and 22631.3073

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	Windows 11 devices attempting to install the February 2024 security update, released February 13, 2024 (KB5034765), might face issues during the update process. The installation might fail when the update’s download reaches 96% of completion, and the device might roll back to the previous update installed.Resulting from this error, the following message might be displayed:“Something didn’t go as planned. No need to worry – undoing changes. Please keep your computer on”.This issue might be reflected in the Windows Event Viewer with error code ‘0x800F0922’.	This issue is addressed in KB5035853.

How to get this update

Before installing this updateMicrosoft 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****Release Channel	Available	Next Step
Windows Update and Microsoft Update	Yes	None. This update will be downloaded and installed automatically from Windows Update.
Windows Update for Business	Yes	None. This update will be downloaded and installed automatically from Windows Update in accordance with configured policies.
Microsoft Update Catalog	Yes	To get the standalone package for this update, go to the Microsoft Update Catalog website.
Windows Server Update Services (WSUS)	Yes	This update will automatically sync with WSUS if you configure Products and Classifications as follows:Product: Windows 11Classification: Security Updates

If you want to remove the LCUTo 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 informationFor a list of the files that are provided in this update, download the file information for cumulative update 5034765. For a list of the files that are provided in the servicing stack update, download the file information for the SSU - versions 22621.3073 and 22631.3073.