Oh! Terribly sorry about the confusion. Let's try running on safe mode.
Restart your computer while holding the Shift key, then select Troubleshoot > Advanced options > Startup Settings > Restart. After your PC restarts, press F4 to boot into Safe Mode.
Open Command Prompt in Safe Mode and run the following commands:
cd %windir%\ServiceProfiles\LocalService\AppData\Local\Microsoft\Ngc
del *.* /f /s /q
Restart your computer and try to sign in again. You can then go to Settings > Accounts > Sign-in options to set up a new PIN.
Please let me know if this worked for you.