> ## Content Index > Fetch the complete content index at: https://elevendecoded.com/llms.txt > Use this file to discover other available public pages before exploring further. # Fix KB5066835 USB Keyboard and Mouse Problems in Windows 11 Recovery - URL: https://elevendecoded.com/windows-11-kb5066835-winre-bug-fix/ - Published: 2026-10-12T11:28:00.000Z - Updated: 2026-10-20T12:32:46.000Z - Author: Md Fakharuddin - Tags: Windows 11, #WinRE, #KB5066835, Recovery Environment The documented recovery problem after KB5066835, the October 14, 2025 Windows 11 security update, affected USB keyboards and mice inside Windows Recovery Environment (WinRE). They could still work in normal Windows while the recovery menus could not be navigated. Microsoft addressed this in KB5070773, released October 20, 2025\. This is different from a missing recovery image or a disabled WinRE configuration. ## How do I know if KB5066835 broke my Windows Recovery Environment? Match the actual symptom: USB input works in Windows but stops responding in WinRE after the affected update. Running reagentc /info in an administrator Command Prompt can show recovery configuration, but it does not test USB input in that environment. Disabled status alone does not establish that this KB caused the problem, and enabled status does not prove the USB issue is absent. ![A Windows 11 laptop screen displaying command prompt with reagentc /info command typed](https://tse1.mm.bing.net/th?q=Windows%2011%20laptop%20running%20reagentc%20command%20photo&w=624&h=352&c=7) ## What exactly did KB5066835 change that caused the WinRE bug? Microsoft’s release notes identify a USB-input failure within WinRE. They do not describe this issue as corruption of the recovery-image path or as a defect limited to custom partition layouts. Diagnose missing-image or registration errors separately rather than treating every recovery symptom as the same update bug. ## How can I fix or work around the WinRE bug caused by KB5066835? If Windows starts, use Settings > Windows Update to install the current applicable cumulative servicing that includes the resolution, then restart as required. For a historical repair specifically involving KB5070773, follow Microsoft’s package, architecture, and prerequisite instructions. If Windows cannot start, use suitable current recovery media or the manufacturer’s recovery/support route, with backups and the BitLocker recovery key available. Re-registering WinRE, guessing a C:\\Recovery path, or changing partitions is not the documented fix for this USB bug. ![Windows 11 laptop screen displaying command prompt with command to enable Windows Recovery Environment](https://tse1.mm.bing.net/th?q=Windows%2011%20laptop%20showing%20command%20prompt%20re-enabling%20WinRE&w=624&h=352&c=7) ## Are there any risks or side effects I should watch out for when fixing the WinRE bug? Avoid partition edits or deleting recovery files merely because USB input fails in a recovery menu. Preserve personal-file backups and recovery credentials before any repair. A System Restore point is not equivalent to a full system image or a personal-file backup. Removing a cumulative security update can also remove fixes and is not the preferred response when a supported resolution exists. ## What can I do to avoid similar Windows update problems in the future? Keep recovery media and personal-file backups current, and review Microsoft’s release-health guidance for your actual Windows release. Organizations can test updates in deployment rings and plan maintenance. Pausing every new security update for weeks is not a universal safety measure; balance any documented compatibility concern against delaying security fixes. ## Conclusion Identify whether the problem is USB input inside WinRE or a separate recovery configuration fault. Apply supported current servicing for the former, and diagnose the latter using its own error details. Do not change recovery partitions or image paths without evidence that those are the problem. ## Frequently Asked Questions ### Can I safely uninstall KB5066835 to fix the WinRE bug? Prefer supported servicing containing the published resolution. Uninstallation may remove security fixes and may not be available for every package. Re-enabling WinRE is not the documented repair for this USB-input issue. ### What does the command reagentc /info tell me about my recovery environment? It reports Windows RE configuration, including status and location information. It does not diagnose why a keyboard fails in recovery, prove that the recovery image is healthy, or attribute a disabled configuration to a particular update. ### Why didn’t Windows notify me about this WinRE issue after the update? A recovery-only problem may not be visible during ordinary desktop use. Check Microsoft’s KB and release-health notices for documented symptoms and resolutions instead of expecting an individual warning from reagentc or assuming a missing notification means there is no issue. ### Is it possible to create my own recovery environment if WinRE is broken? Microsoft installation media or an appropriate manufacturer recovery image can provide an external recovery route. Creating it normally requires a working PC. Booting external media does not by itself repair the installed WinRE configuration, and reinstalling or recovering a drive can remove data.