Microsoft Windows Security Update Breaks VPN Functionality

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Microsoft has confirmed that the latest security updates released for Windows in April have adversely affected VPN services across various versions of the operating system. This issue was reported on Microsoft's release health dashboard, highlighting that Windows devices might experience failures when attempting to establish VPN connections. However, it remains unclear if this issue affects all users or only a subset. The problematic updates influence several versions of the Windows operating system. Affected client versions include Windows 11 versions 23H2, 22H2, and 21H2, along with Windows 10 versions 22H2 and 21H2. On the server side, impacted versions include Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, and Windows Server 2008.

As of now, Microsoft has not provided a specific timeline for when a fix will be issued. Users encountering this problem are advised to utilize the "Get help" application for personal-use PCs, and enterprise devices should refer to the "Support for businesses" link provided by Microsoft for more directed assistance.

In the interim, a potential workaround for those needing immediate VPN access is to revert to a previous Windows release. This can be achieved by uninstalling the recent updates. Users should navigate to the Settings menu, access Windows Update, then go to Update history and select "Uninstall updates." The specific update likely causing the issue is labeled "KB5036893." It is important to note that uninstalling these updates might reduce system security since the updates contain enhancements and security fixes released in April.

Affected Windows Versions

The issue has been identified in several versions of the Windows operating system, including:

  • Windows 11, versions 23H2, 22H2, and 21H2
  • Windows 10, version 22H2
  • Windows Server 2022

Windows Servers, Including:

  • Windows Server 2022
  • Windows Server 2019
  • Windows Server 2016
  • Windows Server 2012 R2
  • Windows Server 2012
  • Windows Server 2008 R2
  • Windows Server 2008

For users continuously facing issues with VPN functionality post-update—an ongoing challenge seen in prior updates such as those in January 2022 and April 2023—alternatives such as switching to a different operating system might be considered. This is highlighted by the performance advantages seen in several Linux distributions over Windows 11 in gaming, driven by optimizations in SteamOS by Valve.

Source: microsoft

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