How To: Fix 'We can't sign in to your account error'

You may get the below error, often after deleting profiles from profile list.

There is an easy fix for IT Admins that should sort this.

Please log onto the computer in question and action the following steps:

Open CMD as admin.
Type in this command: sfc /scannow
Wait for 5-10 minutes for this to complete and then it should have found corrupt files and repaired them.(If not need to explore other fixes)
Restart and issue is resolved.