HTTP.sys Archives

Winsage

November 16, 2025

Microsoft’s Windows 11 AI backlash proves users want 2015 software with 2025 security

Microsoft is facing significant user dissatisfaction with Windows 11 due to core functionality issues, particularly following the KB5066835 update that compromised the Windows Recovery Environment. This update caused mouse and keyboard operations to fail for many users, coinciding with the discontinuation of free security updates for Windows 10. Users are frustrated with the introduction of AI features, such as the Recall AI, which raises privacy concerns and cannot be fully removed. Feedback indicates a desire for a more reliable operating system, akin to Windows 10, without disruptive AI elements. Recent updates have also introduced regressions affecting developers and peripheral functionality, leading to doubts about Microsoft's prioritization of user needs. Historically, Microsoft has responded to user backlash by making adjustments, but the current situation highlights a disconnect between the company's AI ambitions and user expectations for stability and reliability.

Winsage

November 11, 2025

Windows 11’s November Patch Tuesday update brings new Start, battery icon improvements, and important Task Manager fix

Microsoft has rolled out the November Patch Tuesday update for Windows 11, designated as KB5068861 and build 26200.7121, which is now available through Windows Update. Key features include: - A revamped Start menu interface allowing users to pin more app icons, hide the recommended feed, modify the all apps list display, toggle the visibility of the Phone Link companion, and enjoy a larger Start menu that adjusts to screen size. - An updated Taskbar battery icon that is larger, changes color based on battery and power state, and includes a battery percentage indicator. The update also addresses several critical fixes: - Voice Access issue resolved where it would fail during initial setup without a connected microphone. - Fixed a problem where selecting the desktop could open Task View inadvertently. - Corrected an issue in the HTTP.sys request parser for compliance with RFC 9112 standard. Users can download KB5068861 via Windows Update or manually from the Microsoft Update catalog.

Winsage

October 26, 2025

“Emergency Windows Update Declared a ‘Total Disaster’—Is Your PC at Risk?”

A new Windows 11 update, KB5066835, is causing significant issues by breaking localhost connections, preventing locally hosted apps from communicating with the network. Users are experiencing installation failures and problems with peripherals and accessories. Microsoft has acknowledged the issue and is rolling out an emergency patch, which may take over 48 hours to reach affected PCs. The update disrupts the kernel-mode HTTP server (HTTP.sys), leading to connection failures for apps trying to access localhost. Additionally, the update renders the Windows Recovery Environment (WinRE) unusable, as mice and keyboards do not function within it. Users attempting to reinstall the patch or upgrade to newer builds have reported inconsistent results, with fresh installs of Windows 11 24H2 not experiencing the same issues. Caution is advised against attempting unofficial fixes, as they may destabilize the system. Windows 10 users should ensure their systems are updated with the final security patches or consider purchasing Extended Security Updates for continued support.

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 fixes Windows bug breaking localhost HTTP connections

Microsoft has identified a bug affecting HTTP/2 localhost connections and IIS websites after recent Windows security updates, specifically the Windows 11 KB5066835 Patch Tuesday update and the September KB5065789 preview update. Users have reported connection reset errors, such as ERRCONNECTIONRESET and ERRHTTP2PROTOCOL_ERROR, impacting applications like the Duo Desktop app and Visual Studio debugging. The issue is linked to a bug in the HTTP.sys web server used by ASP.NET Core, which can be triggered by various factors including device restarts and update installations. Microsoft has provided steps for resolution, including checking for updates and restarting devices. For non-managed devices, an automatic resolution through Known Issue Rollback (KIR) is available, while enterprise-managed devices require IT administrators to implement KIR group policies. A permanent fix is expected in a future Windows update.

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.

Winsage

October 17, 2025

Windows 11 24H2 and 25H2 Updates Break IIS Websites After Patch Tuesday

Microsoft has acknowledged that the Windows 11 24H2 and 25H2 updates are causing disruptions for IIS websites due to a conflict in the Windows HTTP stack driver (HTTP.sys), resulting in “ERRCONNECTIONRESET” errors for localhost loopbacks and IIS connections. The issue affects devices with updates released on or after September 29, including KB5066835 and KB5065789, impacting server-side applications reliant on HTTP.sys and leading to failed IIS websites or blank pages. The problem may vary based on internet connectivity, system timing, or update installation order. Microsoft is working on a permanent solution and has advised IT administrators to implement a known issue rollback (KIR) through Group Policy to restore stability. Additionally, Microsoft has lifted an upgrade block on Windows 11 24H2 devices that was due to a conflict with a third-party driver.