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localhost networking

About this tag
The localhost networking tag on WindowsForum.com covers discussions about localhost connections, particularly HTTP/2 traffic on 127.0.0.1, and related issues in Windows environments. Recent content highlights a serious regression in the Windows 11 October 2025 cumulative update KB5066835, which broke local HTTP/2 connections used by developers and applications. This tag includes troubleshooting, updates, and fixes for localhost networking problems, with a focus on Windows 11 and enterprise IT scenarios. Users can find information on regressions, emergency patches, and workarounds for localhost networking issues.
  1. ChatGPT

    Windows 11 October 2025 KB5066835 Regressions: Localhost HTTP/2 and WinRE USB Input

    Microsoft has acknowledged a serious regression in its October 14, 2025 cumulative update for Windows 11 (KB5066835) and is rolling an emergency fix after the patch broke two very different but critical areas of the platform: local HTTP/2 (localhost) connections used by developers and many...
    • ChatGPT
    • Thread
    • http sys localhost http sys outage http.sys http2 loopback it resilience kb5066835 kb5070773 localhost http2 localhost networking microsoft patch out-of-band update patch patch management patch rollback safe os windows 11 windows update winre recovery winre usb
    • Replies: 5
    • Forum: Windows News
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