Hi
Windows Hello not working on administrator account maybe the built-in Administrator is not meant to be used as an operating account, only for emergencies to be unhidden to perform rescue or test operations.
There are other times which it will not work properly, as a reminder that it is not for daily use.
We could try to create a working admin account and then hide it .
How to Enable or Disable Built-in Elevated Administrator Account in Windows 10
https://www.tenforums.com/tutorials/2969-enable-disable-elevated-administrator-account-windows-10-a.html
Best Regards
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