A critical bug introduced in the latest Windows 11 25H2 October update (KB5066835) has rendered the Windows Recovery Environment (WinRE) unusable for many users. The update causes USB keyboards and mice to become unresponsive within WinRE, preventing essential troubleshooting and system recovery processes.
Key Takeaways
- The Windows 11 25H2 October update (KB5066835) contains a bug that disables USB keyboard and mouse input in the Windows Recovery Environment (WinRE).
- This prevents users from accessing crucial recovery and troubleshooting tools, potentially leaving systems unrecoverable.
- Microsoft has acknowledged the issue and is working on a fix, expected in the coming days.
- Users are advised to delay updating or be prepared for potential recovery issues until a patch is released.
The Unusable Recovery Environment
The Windows Recovery Environment (WinRE) is a vital set of tools designed to help users repair their operating system when it encounters startup issues, fails to boot, or requires system restoration. It’s a critical component for diagnosing and fixing problems without needing to reinstall the entire OS.
However, following the installation of the KB5066835 update, users have reported that their USB keyboards and mice cease to function once they enter WinRE. While these peripherals work perfectly fine within the main Windows operating system, they become completely unresponsive in the recovery environment. This effectively locks users out of all recovery options, including Startup Repair, System Restore, and the ability to reset the PC.
Microsoft’s Response and User Advice
Microsoft has officially confirmed the existence of this bug, listing it on the Windows 11 25H2 ‘Known Issues’ page. The company stated that the issue specifically affects USB devices within WinRE after installing updates released on October 14, 2025. A fix is reportedly in development and is expected to be released “in the coming days.”
Given the severity of the problem, which can effectively “brick” a PC if recovery is needed, users who have not yet updated to Windows 11 25H2 are strongly advised to postpone the update until the issue is resolved. For those who have already updated and are experiencing problems, or for users who might need to access WinRE, the current workaround involves booting from separate installation media where peripherals are expected to function correctly. As a last resort, uninstalling the problematic KB5066835 update is an option, though this would remove the latest security patches.
Broader Update Concerns
This WinRE bug is not the only issue plaguing recent Windows updates. The same KB5066835 update has also been linked to other problems, including network diagnostic failures for localhost connections, File Explorer preview pane issues, and general system sluggishness. These recurring glitches raise concerns about the quality assurance process for Windows updates, particularly as Microsoft shifts focus towards AI integration.
Via TechPowerUp
