localhost issues Archives

Winsage

October 19, 2025

Windows 11 25H2 October Update Bug Renders Recovery Environment Unusable

Microsoft is facing a challenge with the Windows 11 25H2 October update (KB5066835), which disrupts mouse and keyboard functionality in the Windows Recovery Environment (WinRE), making it inoperative. WinRE is a troubleshooting toolkit that activates during startup problems or system malfunctions. Microsoft confirmed that USB keyboard and mouse work normally within the Windows operating system and is working on a solution. This issue adds to other complications from recent Windows 11 updates, including localhost issues and disruptions to the Windows Media Creation Tool. Users are unable to initiate recovery processes due to the lack of functional input devices.

Winsage

October 19, 2025

Microsoft Confirms Emergency Update For Millions Of Windows Users

Microsoft's latest mandatory security update for Windows 11, KB5066835, has caused significant disruptions, including inoperable localhost connections and multiple installation failures. Users are experiencing issues with locally hosted applications, and the update has also affected certain Logitech peripherals and mouse and keyboard functionality in the Windows Recovery Environment (WinRE). Microsoft has acknowledged these problems and plans to release an emergency fix within 48 hours. A regression in the kernel-mode HTTP server (HTTP.sys) is responsible for the localhost connectivity issues, particularly impacting Internet Information Services (IIS). Users are advised against seeking online troubleshooting solutions, as they have proven ineffective, and some have found risky temporary workarounds.

Winsage

October 18, 2025

Microsoft confirms Windows 11 KB5066835 issues. Localhost, File Explorer preview, install errors

Microsoft has acknowledged that the Windows 11 update KB5066835 is causing significant disruptions, particularly affecting localhost (127.0.0.1) HTTP/2 connections, preventing locally hosted applications from connecting to the network. Installation of the October 2025 Patch Tuesday update may fail due to error codes including 0x800f0922, 0x800f0983, 0x800f081f, 0x80071a2d, and 0x800f0991. A bug is obstructing File Explorer's document previews in the Preview pane, citing security concerns. Compatibility issues have arisen with certain Logitech peripherals, rendering them non-functional, and users are reporting unresponsive mouse and keyboard inputs in the Windows Recovery Environment (WinRE). Despite being a mandatory security update, KB5066835 has introduced features like repositioning on-screen volume indicators and enhancing File Explorer's context menu loading speed, but these enhancements have disrupted critical functionalities. Microsoft is rolling out an emergency patch to resolve localhost-related problems, which may take over 48 hours to appear. A workaround for localhost issues involves modifying the Windows Registry to disable HTTP/2. File Explorer's preview issue can be addressed by unblocking files using PowerShell or modifying the registry. Logitech's specialized features have stopped working for some users, and keyboard and mouse inputs are unresponsive in WinRE after the update. Users can disable WinRE and replace the WinRE image as a potential fix, but this is recommended only for IT administrators.