Quote:Microsoft has released an out-of-band (OOB) update to patch an issue related to Windows 11's Recovery Environment. Users had reported a major bug that was introduced in this month's Patch Tuesday update.

KB5066835, which was released on October 14, 2025, had a couple of known issues, one of which was related to USB devices not working in the Windows Recovery Environment (WinRE). This issue affected keyboards, mice, which prevented users from performing recovery options in WinRE. That sounds like a proper nightmare, if you had trouble with Windows, you could be stuck on the recovery screen that didn't register any input from the user.

A week after the update was released, Microsoft has announced that KB5066835 is now available as an emergency out-of-band update to address the problem. It is a cumulative patch, so it contains all the security fixes, updates that were shipped in the previous update. Here's the page on Microsoft's support portal that has the release notes for the latest update.

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