localhost debugging

  1. Windows October 2025 Update Regression Breaks WinRE and Localhost

    Microsoft’s October cumulative updates quietly introduced a regression that left one of Windows’ most important safety nets — the Windows Recovery Environment — effectively unusable on many machines, while also breaking local developer workflows and several user-facing features across Windows 10...
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    • http sys issues localhost debugging windows update regression winre recovery
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    • Forum: Windows News

  2. Windows 11 KB5066835 Localhost HTTP/2 Failure: Triage and Mitigations

    The October cumulative updates for Windows 11 produced a high-impact, widely reported regression that broke many localhost-based HTTP/2 connections on upgraded systems — leaving developers unable to debug IIS/IIS Express sites, blocking desktop apps that rely on local loopback services, and...

  3. KB5066835 Breaks Local IIS on Windows 11: Mitigations and Rollback Guide

    A wide-ranging October 2025 cumulative update for Windows 11 (KB5066835), and at least one related preview package, has broken many local IIS-hosted sites and developer workflows — causing ERR_CONNECTION_RESET, ERR_HTTP2_PROTOCOL_ERROR and outright failure of localhost-based services for...
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    • http.sys http2 http2 regression iis iis express kb5066835 local iis localhost localhost debugging patch management patch tuesday 2025 regression rollback windows 11
    • Replies: 9
    • Forum: Windows News