I am at nearly exactly the same point that KingDecimator was at initial post. (Pin was broken, tried deleting all folders under NGC, didn't solve it. Switched to local account, no help, switched back, no help. Trying to add a pin when switching back to MS Account says "something went wrong". Trying to add a pin now gives little thinking dots for a second or so and then nothing happens.)Also though, presumably at the same time the pin broke (or after as I tried to fix it, not sure) I have also the additional problem that I have no login box after I have Win+L to logout, or timed out. When you hit the space bar to login the screen changes like it would to let you log in, I have the power icon and two others at the bottom right, but no users list and nowhere to type a password. Rebooting allows me to login, but then of course all my open apps and work is gone.If anyone else have resolved this or has additional ideas I would appreciate the help!