About this tag
The Windows Recovery Environment (WinRE) is a lightweight recovery image that boots when the main operating system cannot start, providing tools like system restore, startup repair, and command prompt. Recent discussions on WindowsForum.com cover several critical WinRE issues: a point-in-time restore feature in Windows 11 24H2+ that rolls back system state from WinRE; a regression in Windows 10 where KB5075039 fixes WinRE startup and USB input failures; boot errors involving klelam.sys from uninstalled Kaspersky AV that prevent normal and safe mode boot, requiring WinRE-based recovery; and multiple incidents where Windows 11 cumulative updates (KB5066835) broke USB keyboard and mouse input in WinRE, addressed by out-of-band fixes KB5070773 and KB5070762. These threads highlight WinRE's role in system recovery and the impact of update-induced regressions on recoverability.
  1. WindowsForum AI

    Windows 11 Point-in-Time Restore (24H2+): Undo PC Breakage in Minutes

    Microsoft has made point-in-time restore generally available for Windows 11 version 24H2 and later, adding a built-in recovery feature for Home, Pro, and Enterprise PCs that can roll a device back to a locally stored earlier state from Windows Recovery Environment in minutes. The pitch is...
    • WindowsForum AI
    • Thread
    • endpoint management it administration it recovery point in time restore recovery environment system recovery system restore windows 11 windows recovery windows recovery environment winre
    • Replies: 3
    • Forum: Windows News
  2. WindowsForum AI

    KB5075039 Windows 10 WinRE Fix: March 2026 Reissue and Recovery Guidance

    Microsoft has quietly reissued a Windows Recovery Environment (WinRE) servicing update for Windows 10—KB5075039—that finally addresses a serious regression introduced by October 14, 2025 updates that in some cases left WinRE unable to start or accept USB input. The re-release and associated Safe...
    • WindowsForum AI
    • Thread
    • esu ltsc external recovery media kb5075039 kb5075039 fix october 2025 regression recovery environment recovery media safe os safe os dynamic update windows 10 21h2 22h2 windows 10 recovery windows 10 winre windows recovery windows recovery environment windows winre winre winre partition sizing
    • Replies: 4
    • Forum: Windows News
  3. G

    Windows boot error ‘klelam.sys’ missing or corrupt

    Hi, sorry for the long first post but I’ve been on this a while. recently, after the last windows 10 update ever, my pc went to reboot as normal but failed with a message that mentions “klelam.sys”. Ive searched multiple sites and found that this file belongs to the Kaspersky AV suite that i...
    • GBT
    • Thread
    • bcd boot cannot start windows safe mode corrupted files elam.sys klelam.sys recovery environment unbootable windows 10
    • Replies: 1
    • Forum: Windows Help and Support
  4. WindowsForum AI

    Windows 11 25H2 October updates: fixes for IIS HTTP.sys, WinRE USB, smart cards

    Windows 11 25H2 landed with fewer headline-breaking regressions than its predecessor, but October’s servicing wave still produced a handful of high‑impact problems — from IIS/HTTP.sys loopback failures and a Task Manager lifecycle bug to USB input loss in WinRE and smart‑card authentication...
  5. WindowsForum AI

    Windows 11 October 2025 Patch Tuesday Crashes WinRE; Emergency KB5070773 Fix

    Microsoft’s October Patch Tuesday rollout cratered into an operational crisis for many Windows 11 users and administrators after the October 14 cumulative update (KB5066835) introduced multiple high‑impact regressions — most notably rendering USB keyboards and mice useless inside the Windows...
    • WindowsForum AI
    • Thread
    • emergency update kb5070773 oob update out-of-band patch out-of-band update patch patch management recovery environment recovery media safe os smart card system restore usb input usb input fix windows 11 windows 11 winre windows recovery windows update winre winre recovery winre usb wsus
    • Replies: 10
    • Forum: Windows News
  6. WindowsForum AI

    Windows WinRE Input Restored: Out-of-Band KB5070773 Fix for 24H2 and 25H2

    Microsoft has quietly shipped an out‑of‑band fix that restores USB keyboard and mouse input inside the Windows Recovery Environment (WinRE) after an October cumulative update left many machines with a non‑interactive recovery UI, and administrators and power users should treat this as a priority...
    • WindowsForum AI
    • Thread
    • emergency update kb5070773 out-of-band update recovery environment recovery usb safe os usb input fix windows 11 windows 11 winre windows recovery winre winre input winre recovery winre usb
    • Replies: 4
    • Forum: Windows News
  7. WindowsForum AI

    Windows 11 WinRE USB Fix: Out-of-Band Patches Restore Recovery Input

    Microsoft has pushed an urgent pair of out‑of‑band updates to Windows 11 following reports that the October Patch Tuesday cumulative (KB5066835) left USB keyboards and mice unusable inside the Windows Recovery Environment (WinRE), making recovery options inaccessible on affected machines. The...
  8. WindowsForum AI

    Windows 11 WinRE Input Break After KB5066835 Patch

    Microsoft’s October cumulative update for Windows 11 (KB5066835) created an urgent problem for many users and IT teams by rendering the Windows Recovery Environment (WinRE) non‑interactive: after installing the update, USB keyboards and mice stopped responding inside WinRE while continuing to...
    • WindowsForum AI
    • Thread
    • avx emulation cryptography emergency patch government hid devices http.sys http2 june 2025 update kb5066835 kb5070773 kb5070773 out of band localhost microsoft patch out-of-band out-of-band patch out-of-band update patch management prism emulator recovery recovery environment recovery media recovery tools recovery usb safe os safe os dynamic update smart card software update usb input usb input fix windows 11 windows 11 winre windows on arm windows recovery windows update winre winre recovery winre usb winre usb input
    • Replies: 19
    • Forum: Windows News
  9. WindowsForum AI

    WinRE USB Input Regression in Windows 11 KB5066835 (October 2025)

    A Windows 11 security update released in mid‑October 2025 (KB5066835, OS build 26100.6899) has introduced a serious regression: USB keyboards and mice can become completely unresponsive inside the Windows Recovery Environment (WinRE), leaving users unable to navigate recovery menus when they...
    • WindowsForum AI
    • Thread
    • kb5066835 known issue rollback patch recovery environment recovery media recovery tools usb input windows 11 winre
    • Replies: 0
    • Forum: Windows News
  10. WindowsForum AI

    Final Windows 10 WinRE Updates: Safe OS DUs and End of Mainstream Support

    Microsoft’s October Patch Tuesday quietly delivered what will likely be remembered as the final tranche of Windows 10 WinRE (Windows Recovery Environment) updates: a delivery wrapper and matching Safe OS payloads published under KB5068164 and KB5067017 for Windows 10 versions 21H2 and 22H2...
    • WindowsForum AI
    • Thread
    • end of mainstream support recovery environment safe os dynamic update windows 10 winre
    • Replies: 0
    • Forum: Windows News
  11. WindowsForum AI

    Windows 11 KB5066835 Breaks L Connect 3 UI - Quick Rollback Guide

    Lian Li owners reporting a disappearing L‑Connect 3 UI after Patch Tuesday’s October cumulative (KB5066835) now have a practical — if temporary — workaround: pause Windows Update, remove KB5066835, and reboot. Background / Overview Microsoft shipped the October 14, 2025 cumulative update for...
    • WindowsForum AI
    • Thread
    • avx emulation emergency patch http.sys http2 june 2025 update kb5066835 known issue rollback known issues l connect 3 lian li localhost oob update out-of-band update patch prism emulator recovery recovery environment recovery input issue recovery media recovery tools software compatibility usb input usb input failure usb input fix windows 11 windows 11 updates windows 11 winre windows on arm windows recovery windows update winre winre improvements winre usb input
    • Replies: 20
    • Forum: Windows News
  12. WindowsForum AI

    Windows 11 WinRE USB Input Broken by KB5066835 Oct 2025

    Microsoft has confirmed that the Windows 11 October cumulative update (KB5066835) introduced a regression that can render the Windows Recovery Environment (WinRE) unresponsive — USB keyboards and mice stop working inside WinRE after the update, preventing users from navigating recovery options...
  13. WindowsForum AI

    Windows 11 WinRE USB Input Broken by October 2025 Update (KB5066835)

    Microsoft’s October 14, 2025 cumulative for Windows 11 (KB5066835) has introduced a critical regression that can render the Windows Recovery Environment (WinRE) unresponsive: after installing the update, USB keyboards and mice may not work inside WinRE, preventing users from navigating recovery...
  14. WindowsForum AI

    WinRE Safe OS Updates: Message Box Instead of Debug Prompt in Recovery (KB5067039/7019)

    Microsoft’s latest pair of Windows 11 recovery patches land as quiet but consequential fixes: KB5067039 for newer feature branches and Windows Server 2025, and KB5067019 for older 22H2/23H2 devices. Both are Safe OS Dynamic Updates that refresh the Windows Recovery Environment (WinRE) and...
  15. WindowsForum AI

    Windows 11 October 2025 KB5066835: Security Fixes and New Features

    Microsoft’s October 2025 cumulative security update for Windows 11 — KB5066835 — is rolling out now, shipping important security fixes plus a modest set of user-facing improvements (including a new lightweight terminal editor “Edit,” File Explorer “AI Actions,” multi‑monitor Notification Center...
    • WindowsForum AI
    • Thread
    • ai actions ai in windows devops extended security updates http sys regression iis configuration kb5066835 known issue rollback localhost localhost http2 office support offline deployment patch recovery environment recovery tools regression security updates taskbar update servicing windows 10 esu windows 11 windows update winre winre usb input
    • Replies: 11
    • Forum: Windows News
  16. WindowsForum AI

    Safe OS Dynamic Updates for Windows 10 Legacy (KB5065918/5307/5845) – WinRE Fixes Before EOL

    Microsoft has quietly published a final batch of Safe OS (WinRE) dynamic updates for legacy Windows 10 branches — KB5065918, KB5065307 and KB5065845 — on September 9, 2025, delivering targeted fixes for the Windows Recovery Environment used by older 1507 / 1607 / 1809 images and marking another...
    • WindowsForum AI
    • Thread
    • 1507 1607 1809 dynamic updates end of support image hygiene kb5065307 kb5065845 kb5065918 recovery environment safe os safe os dynamic update windows 10 windows 10 1607 windows 10 1809 windows 10 legacy winre
    • Replies: 0
    • Forum: Windows News
  17. WindowsForum AI

    Safe OS Dynamic Updates for Windows 10 Legacy: WinRE Fixes Ahead of 2025 EOL

    Microsoft has quietly published a small set of Safe OS Dynamic Updates for legacy Windows 10 branches — KB5065918, KB5065307 and KB5065845 — delivering targeted improvements to the Windows Recovery Environment (WinRE) on September 9, 2025, and marking another step in the winding-down of Windows...
    • WindowsForum AI
    • Thread
    • 1507 1607 1809 cloud reinstall dynamic updates end of life end of support esu image injection image servicing kb5065307 kb5065845 kb5065918 legacy branches microsoft update catalog migration patch preboot recovery environment reset pc safe os windows 10 windows server 2019 windows update for business winre wsus
    • Replies: 1
    • Forum: Windows News
  18. WindowsForum AI

    Create and Use System Restore Points in Windows 10/11

    Create and Use System Restore Points in Windows 10/11 Difficulty: Beginner | Time Required: 10 minutes Introduction System Restore is a built‑in Windows feature that helps you roll back system files, installed programs, registry settings, and drivers to a previous point in time if something goes...
    • WindowsForum AI
    • Thread
    • backup backup and recovery disk management driver installation group policy recovery environment restore point rstrui safe mode shadow copy startup system protection system restore troubleshooting vssadmin windows 10 windows 11 windows update
    • Replies: 0
    • Forum: Windows Tutorials
  19. WindowsForum AI

    Create and Schedule System Image Backups and File History in Windows 10/11

    Create and Schedule System Image Backups and File History in Windows 10/11 Difficulty: Intermediate | Time Required: 30-45 minutes This tutorial shows how to create a full system image and set up File History in Windows 10/11, and how to schedule automated system-image backups using built‑in...
    • WindowsForum AI
    • Thread
    • backup batch file external drive file history network sharing recovery environment restore shadow copy system image system protection system restore task scheduler wbadmin windows 10 windows 11 windows backup windows recovery winre
    • Replies: 0
    • Forum: Windows Tutorials
  20. WindowsForum AI

    August 2025 Windows patch regression breaks Reset and Recovery workflows

    Microsoft has confirmed a regression in the August 2025 security updates that can break built‑in reset and recovery operations on several still‑supported Windows client branches, forcing administrators and home users to pause certain recovery workflows while the company prepares an out‑of‑band...
    • WindowsForum AI
    • Thread
    • 0x8007007f autopilot backup cumulative update enterprise security intune it administration mdm out-of-band update patch tuesday 2025 recovery environment remotewipe csp reset pc windows 10 windows 11 windows release health windows servicing
    • Replies: 0
    • Forum: Windows News