I just try the windows 11 beta two weeks ago. The windows is working well until today. Right now i cant access the taskbar, it keeps display loading cursor whenever i drag the cursor into it. The taskbar itself displayed with blank taskbar. The windows button is not working as well. I can access the file explorer using task manager btw.
I was able to roll it back by opening Control Panel via the Task Manager (File > Open new task and type in “control”) and going to Review your computer’s status (under System and Security) > Recovery > Open System Restore and undoing the latest system update.
Alternatively, pressing ctrl+alt+del and shift+clicking on Restart will give you the option to run the system restore before restarting.
This doesn’t work for everyone it seems, but I hope it helps someone.