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Windows 11 First Security Update Released

Windows 11 Updates

Microsoft released the first security update for the previously released Windows 11 on the October patch day. This first update fixes some bugs and security vulnerabilities and is available to all users who have already made the switch.

The first update for Windows 11 is the regular October patch, which will be distributed immediately. The update can already be obtained via the Windows update function. The update brings the build to the new version number 22000.258. The initial release has the build number 22000.194. Microsoft has summarized the most important changes for the new version in the Knowledge Base. As usual, there is also an article on the Windows 11 patch in the Microsoft Knowledge Base, which can be found under KB5006674.

Details are still missing

The update is available to all users who installed Windows 11 at the beginning of October after the final release. However, Microsoft does not reveal many details in the Knowledge Base about the changes in this first update. This is nothing unusual – the information about the changes has been kept very brief at the patch days for months. For security-relevant changes, the release notes will be updated in the days after the start. The following information can already be found:


Updates security for your Windows operating system.

Improvements and fixes

This security update contains quality improvements. The most important changes include:

Fixed known compatibility problems 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.

If you have installed previous updates, only the new fixes contained in this package will be downloaded and installed on your device.

For more information on the security vulnerabilities that have been fixed, see the Security Update Guide and the October 2021 security updates.

Windows 11 Service Stack Update – 22000.190

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

Known issues

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

Mark Goodman

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