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Microsoft has released its May Patch Tuesday update (KB5013943) for Windows 11

Patch Tuesday

It’s the second Tuesday of the month which means only one thing, that it’s Patch Tuesday. The update for Windows 11 21H2 this month is designated KB5013943 and will take your system to OS Build 22000.675. The Windows 11 service stack has also been updated to Build 22000.652.

Here are the relevant release notes for this April Patch Tuesday update (KB5013943):


  • Addresses security issues for your Windows operating system.


This security update includes improvements that were a part of update KB5012643 (released April 25, 2022) and also addresses the following issues:

  • 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.
  • Addresses a known issue that might cause your screen to flicker if you start your device in Safe Mode. Components that rely on explorer.exe, such as File Explorer, the Start menu, and the taskbar, might be affected and appear unstable.

Known issue(s):

Applies to Symptom Workaround
IT admins

After installing the Windows updates released January 11, 2022 or later Windows versions on an affected version of Windows, recovery discs (CD or DVD) created by using the Backup and Restore (Windows 7) app in Control Panel might be unable to start.

Recovery discs that were created by using the Backup and Restore (Windows 7) app on devices which have installed Windows updates released before January 11, 2022 are not affected by this issue and should start as expected.

Note No third-party backup or recovery apps are currently known to be affected by this issue

We are working on a resolution and will provide an update in an upcoming release.

The standalone link to manually download the update is available on Microsoft Update Catalog here. You can find the official release notes for KB5013943 here.

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