KB5120243: Setup Dynamic Update for Windows Server 2022: August 11, 2026

適用先

Windows Server 2022

Summary

This update makes improvements to Windows setup binaries or any files that setup uses for feature updates.

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

Available	Next step
	This update is available through Windows Update. It will be downloaded and installed automatically.

Available	Next step
	To get the standalone package for this update, go to the Microsoft Update Catalog website. To download updates from the Update Catalog, see Steps to download updates from the Windows Update Catalog.

Available	Next step
	This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows: Product: Microsoft Server operating system-21H2 Classification: Updates To set up your WSUS server to sync based on products and classifications, see Synchronizing Update by Product and Classification. To manually import updates into WSUS, see Import updates into WSUS by using PowerShell.

Available

Next step

This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows:

To set up your WSUS server to sync based on products and classifications, see Synchronizing Update by Product and Classification.

To manually import updates into WSUS, see Import updates into WSUS by using PowerShell.

Item	Description
Prerequisites	There are no prerequisites to apply this update.
Restart information	You do not have to restart your computer after you apply this update.
Update replacement information	This update replaces the previously released update KB5079518.
File information	A list of the files included in this update is provided in a CSV (comma-delimited) (.csv) file. You can open the file in a text editor, such as Notepad, or in Microsoft Excel. Note The English (United States) version of this software update might contain files for additional languages. Download the file information for update KB5120243.

Windows Secure Boot certificate expiration

Important: Secure Boot certificates used by most Windows devices have started expiring in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.
End of support

After October 14, 2031, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows Server 2022. We recommend that you upgrade to a later version of Windows Server.