Windows 11 October Update Breaks Localhost HTTP/2 (127.0.0.1) Connections
Windows 11 October Update Breaks Localhost HTTP/2 (127.0.0.1) Connections Summary of the issue Reports surfaced after Microsoft’s October 2025 Windows 11 updates that applications attempting to connect to the loopback address (127.0.0.1) over HTTP/2 are failing to establish or maintain connections. Affected workflows include local development servers, desktop applications that talk to bundled local services,…