After Win 10 auto update, I signed in and received error message (see attached) saying "we can't sign you in" and suggesting signing out and signing in again may solve the problem. It did not. Also all my files were wiped out. Googled this problem and found that many people had the same problem. Suggested solutions did not work for me. Only way I can use computer is signing into a guest account.
Anyone know how to correct this problem?