Windows 11 Build 22000.258: Microsoft releases the first cumulative update

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With KB5006674 Microsoft publishes the first cumulative update for Windows 11 and raises the operating system to build 22000.258. In addition to some minor security updates, problems with Intel “Killer” and “SmartByte”, which are related to the User Datagram Protocol (UDP) occurred.

Security updates and first small product updates

In addition to the Security updates from October 2021, which also improve the components .NET Core and Visual Studio, DirectX, the Windows Installer and the Windows Kernel, the official Release Notes make the following changes to cumulative update KB50006674.

Known issues from KB5006674:

  • Microsoft is currently not aware of any issues with this update.

Problems resolved by KB5006674:

  • Updates the Security for your Windows operating system.
  • Fixes known compatibility issues between some Intel “Killer” and “SmartByte” network software and Windows 11 (original version).
  • Devices with the affected software can discard UDP (User Datagram Protocol) packets under certain conditions. This leads to performance and other problems with protocols based on UDP.
  • For example, some websites may load more slowly than others on the affected devices, which can cause videos to stream more slowly in certain resolutions. VPN solutions based on UDP can also be slower.

The cumulative update KB50006674 is already being rolled out to all users with Windows 11 Build 22000.194 and automatically raises the operating system to the new Build 22000.258.

Windows 10 receives security updates

The security updates for October will be shipped as KB5006670 also distributed for Windows 10, which is raised to build 19044.1288 (“21H2”), 19043.1288 (“21H1”), 19042.1288 (“20H2”) or 19041.1288 (“20H1”).

Download on ComputerBase

The cumulative updates for Windows 11 and Windows 10 can be downloaded as usual directly below this message from the download area of ​​ComputerBase.

The editorial team would like to thank team member “Eiswiesel”, who is also responsible for the download area, for pointing this out.

Update 10/12/2021 11:22 p.m.

Fix for CPPC2 and L3 on AMD Ryzen not yet included

Like the website reported, AMD has postponed the fix for the Collaborative Power Performance Control 2 (CPPC2) introduced with AMD Ryzen 3000 (test) alias Matisse from October 12th to October 21st, the fix for the problems with the L3 cache is therefore for the Scheduled October 19 by Microsoft.

The problems with CPPC2 are solved by a new driver from AMD, while the L3 cache is fixed by a Windows update.

The editors would like to thank community member “Verangry” for reporting this update.


  • Windows 10 cumulative update

    4.2 stars

    Package containing hotfixes, security updates, critical updates, and updates to fix problems.

    • Version 2004 / 20H2 / 21H1 (Build 19043.1288) KB5006670, Win 10 German
    • Version 1909 (Build 18363.1854) KB5006667, Win 10 German
    • +3 more
  • Windows 11 cumulative update

    0.0 stars

    Regularly updated packages with all security updates and bug fixes for Windows 11.

    • Version 21H2 (Build 22000.258) KB5006674, Win 11 German

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