Hi DH. I'm Greg, an installation specialist, 10 year Windows MVP, and Volunteer Moderator. If you will work with me I will be here to help until the issue is resolved.
Tick the box in File Explorer View tab to Show Hidden Files.
Browse to C:\Windows\ServiceProfiles\LocalService\AppData\Local\Microsoft\Ngc
Delete or rename to Ngc.old this folder to reset the PIN.
**You may need to first take ownership of the folder: https://www.tenforums.com/tutorials/3841-add-ta...
Once you delete or rename the folder it will recreate it so you can add a PIN normally in Sign-In Options. You may need to restart the PC first.
For any unexpected problems see the full illustrated tutorial covering all possible problems here:
https://www.askvg.com/fix-unable-to-add-and-use...
I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.
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