Overview

• Microsoft confirms that after installing KB5066835, USB keyboards and mice do not work inside the Windows Recovery Environment.
• The company says it is preparing an out-of-band update in the coming days to resolve the issue.
• USB input functions normally within Windows itself, but recovery tools become unusable because the interface cannot be controlled.
• Reports indicate the problem affects Windows 11 versions 25H2 and 24H2 as well as Windows Server builds.
• Workarounds include uninstalling KB5066835 or manually reverting the WinRE image, with the latter carrying technical risk, and the update previously required an emergency fix for localhost connectivity.