October 11, 2022—KB5018427 (OS Build 22621.674)
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 22H2, see its update history page.
Note Follow @WindowsUpdate to find out when new content is published to the Windows release health dashboard.
- We address security issues for your Windows operating system.
This security update includes improvements that were a part of update KB5017389 (released September 30, 2022). Key changes in this release include:
- This update contains miscellaneous security improvements to internal OS functionality. No additional issues were documented for this release.
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 October 2022 Security Updates.
Known issues in this update
|Using provisioning packages on Windows 11, version 22H2 (also called Windows 11 2022 Update) might not work as expected. Windows might only be partially configured, and the Out Of Box Experience might not finish or might restart unexpectedly. Provisioning packages are .PPKG files which are used to help configure new devices for use on business or school networks. Provisioning packages which are applied during initial setup are most likely to be impacted by this issue. For more information on provisioning packages, please see Provisioning packages for Windows.
Note Provisioning Windows devices using Windows Autopilot is not affected by this issue.
Windows devices used by consumers in their home or small offices are not likely to be affected by this issue.
|If you can provision the Windows device before upgrading to Windows 11, version 22H2, this will prevent the issue.
We are presently investigating and will provide an update in an upcoming release.
|Copying large multiple gigabyte (GB) files might take longer than expected to finish on Windows 11, version 22H2. You are more likely to experience this issue copying files to Windows 11, version 22H2 from a network share via Server Message Block (SMB) but local file copy might also be affected.Windows devices used by consumers in their home or small offices are not likely to be affected by this issue.
|To mitigate this issue, you can use file copy tools that do not use cache manager (buffered I/O). This can be done by using the built-in command-line tools listed below:
robocopy \\someserver\someshare c:\somefolder somefile.img /J
xcopy \\someserver\someshare c:\somefolder /J
We are working on a resolution and will provide an update in an upcoming release.
How to get 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 11
Classification: Security Updates
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.
For a list of the files that are provided in this update, download the file information for cumulative update 5018427.
For a list of the files that are provided in the servicing stack update, download the file information for the SSU – version 22621.378.
MSU file from Microsoft Update Catalog
Download KB5018427 MSU for Windows 11 v22H2 64-bit (x64) – 242.6 MB
Download KB5018427 MSU for Windows 11 v22H2 ARM64 – 323.3 MB
64-bit ISO download: Select language for Windows 11, version 22H2 (22621.674) amd64
ARM64 ISO download: Select language for Windows 11, version 22H2 (22621.674) arm64