MC378267 – Take action: May 2022 security update available for all supported versions of Windows Icon

check before: 2022-05-24




Windows Desktop, World tenant


Change type:

Admin impact, Feature update



The May 2022 security update release, referred to as our "B" release, is now available for Windows 11 and all supported versions of Windows 10. We recommend that you install these updates promptly. For more information about the contents of this update, see the release notes, which are easily accessible from the Windows 11 and Windows 10 update history pages. For instructions on how to install this update on your home device, check the Update Windows article. To learn more about the different types of monthly quality updates, see our Windows quality updates primer.

Highlights for the Windows 11 update:

Addresses a known issue that might cause issues for some .NET Framework 3.5 apps or prevent those apps from opening. The affected apps use certain optional components in .NET Framework 3.5, such as Windows Communication Foundation (WCF) and Windows Workflow (WWF) components.
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.

Short on time? Watch our short monthly release notes video for a summary of this month’s Windows 11 updates.

For instructions on how to install this update for your operating system, see the KB for your OS listed below:

Windows 11, version 21H2 (original release): KB5013943
Windows 10, version 21H2: KB5013942
Windows 10, version 21H1: KB5013942
Windows 10, version 20H2, Windows Server, version 20H2: KB5013942
Windows 10, version 1909, Windows Server, version 1909: KB5013945
Windows 10, version 1809, Windows Server, version 1809, Windows Server 2019: KB5013941
Windows 10, version 1607, Windows Server 2016: KB5013952
Windows 10, version 1507: KB5013963
Windows 8.1, Windows Server 2012 R2: Monthly Rollup: KB5014011 / Security Only: KB5014001
Windows Server 2012: Monthly Rollup: KB5014017 / Security Only: KB5014018
Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1: Monthly Rollup: KB5014012 / Security Only: KB5013999
Windows Server 2008 Service Pack 2: Monthly Rollup: KB5014010 / Security Only: KB5014006

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