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Microsoft launches April Patch Day for Windows 10 and 11

Microsoft launches April Patch Day for Windows 10 and 11

Microsoft released security updates for Windows 10 and Windows 11 on April Patch Day. New versions fix bugs and vulnerabilities – and there are a number of improvements.

Regular security updates and maintenance

Patches begin for all users of versions that are still fully supported. Updates are recommended for all users because they plug security vulnerabilities and provide improvements. Microsoft lists all available changes and variants for Desktop, Server, or HoloLens in the Windows Update Log and has published corresponding knowledge base articles. We've compiled the available updates.

Updates can be obtained through the Windows Update functionality, through the Microsoft Update Catalog, or through Windows Server Update Services (WSUS).

Security-related changes

Microsoft combines the latest service stack update (SSU) for the operating system with the latest cumulative update (LCU). If you are using an older LCU update, you must first implement the SSU updates provided separately. Little tip: At the beginning of the release, it may not be possible to access Knowledge Base articles directly from Microsoft. But this usually changes very quickly. You can actually find all new releases by searching the Microsoft Update Catalog. The following list will help you check whether you have the latest version installed or not.

There you will find the latest version numbers for individual Windows versions. Check your installed version number by using the keyboard command Windows + R to open the Run dialog box, then entering “WinVer” will call up the version view.

Windows 10 versions:

  • Versions 21H2 and 22H2 KB5036892 (Build 19044.4291, 19045.4291)
  • Version 1809, KB5036896 (Build 17763.5696)
  • Version 1607, Windows Server 2016, KB5036899 (Build 14393.6897)
  • Version 1507, KB5036925 (Build 10240.20596)

Windows 11 versions:

  • Windows 11 versions 22H2 and 23H2 KB5036893 (Build 22621.3347 and 22631.3347)
  • Windows 11 version 21H2, KB5036894 (Build 22000.2899)

Microsoft has already summarized the most important changes for the new version. We have translated and summarized the most important updates for you. As usual, there is an article about the patch in the knowledge base.

The most prominent features of Windows 10

This security update includes quality improvements that were part of update KB5035941 (released March 26, 2024). If you install this knowledge base:

  • This update makes various security improvements to internal operating system features. No additional issues are documented for this release.
  • Overview of changes in this Knowledge Base article: KB5036892.

The most prominent features of Windows 11

This security update includes improvements that were part of update KB5035942 (released March 26, 2024). If you install this knowledge base:

  • This update makes various security improvements to internal operating system features. No additional issues are documented for this release.
  • If you installed previous updates, only new updates included in this package will be downloaded and installed on your device.

Windows 11 Service Stack Update – 22621.3447 and 22631.3447

  • This update makes quality improvements to the Service Stack, the component that installs Windows updates. Service Stack Updates (SSU) ensure that you have a stable and reliable service stack so that your devices can receive and install Microsoft updates.

Vulnerability details

There were some serious vulnerabilities in Windows Bitlocker, Microsoft Streaming Service, kernel, Microsoft Outlook, and Office in general. The update also addresses vulnerabilities in Windows Remote Desktop, Secure Boot, Windows Bluetooth drivers, and several vulnerabilities in the Windows kernel.

More information about fixed vulnerabilities can be found at Security Update Guide And in April 2024 security updates.

Windows 11 FAQ – Frequently asked questions Help, tips and tricks in the FAQ area

summary

  • Microsoft releases April Patch Day updates for Windows
  • New releases fix bugs and vulnerabilities in Windows
  • Updates are recommended for supported Windows versions
  • Get patches via Windows Update, Update Catalog, and WSUS
  • A combination of the latest SSU and LCU updates
  • The latest version numbers can be checked via Windows+R and WinVer.
  • Serious vulnerabilities in Bitlocker, Outlook, and Kernel have been fixed

See also: