PSA for anyone planning on using Windows Recovery Environment (for example, to boot in to Safe Mode, to run DDU to remove and update graphics drivers for MSFS…)
KB5066835 disables USB-connected keyboard and mouse in the Windows Recovery Environment - making it impossible to actually interact with the on-screen menu (eg, to select Safe Mode). Bluetooth or PS2 keyboards and mice are not affected. Microsoft is aware and will fix it in a future update.
This is exactly what I ran in to last week when I wanted to boot to safe mode, to run DDU, to update NVIDIA Game Ready Drivers - I restarted holding Shift, which puts you in the WinRE where you can choose to boot to Safe Mode… but I could not navigate the screen with mouse or keyboard!