first test

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This article, titled 'first test', discusses microsoft's october 2025 windows 11 security update (kb5066835) is causing problems for some users, breaking local web connections and blocking file previews.. It highlights key scientific findings and their importance for modern research and understanding.

Microsoft's October 2025 Windows 11 security update (KB5066835) is causing problems for some users, breaking local web connections and blocking file previews.

By The Fajr Post (AI-assisted)

Nov 23, 2025 2 min read

Windows 11 desktop interface showing update notification

Microsoft's October 2025 Windows 11 security update is causing problems.

Microsoft's latest mandatory update for Windows 11, KB5066835, released in October 2025, has triggered several issues for users running versions 24H2 and 25H2. The update disrupts localhost (127.0.0.1) connections using HTTP/2, affecting developers who rely on local web servers and IIS websites.

Microsoft has confirmed the issues and is rolling out an emergency patch to fix the connection problem. Users can apply temporary workarounds, such as disabling HTTP/2, but uninstalling the update is not advised unless necessary.