HI Umbrex. I'm Greg, 10 years awarded Windows MVP, specializing in Installation, Performance, Troubleshooting and Activation, here to help you.
Here's here how to reset the PIN in Windows 10 and 11 when it will not work correctly from Settings > Accounts > Sign In Options:
Open Windows File Explorer using the file folder icon on your task bar.
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:
Add Take Ownership to Context Menu in Windows 11 | Windows 11 Forum
Once you delete or rename the folder it will recreate it so you can add a PIN normally in Windows Settings > Accounts > Sign-In Options. You may need to restart the PC first.
For any unexpected problems see tutorials covering all possible problems here:
How to Reset a PIN in Windows 11 - Website for Students
https://www.askvg.com/fix-unable-to-add-and-use...
https://www.lifewire.com/remove-pin-from-window...
Based on the results you post back I may have other suggestions if necessary.
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