Hello, thank you for reaching out to Microsoft Q&A.
- Do you have the Option to reset your PIN from the Sign-in screen? Select the ' I forgot my PIN' option on the sign-in screen and follow the prompts to reset it.
Alternatively, if you've signed in with your Microsoft account password, switch the sign-in option from PIN to Password and sign in with it.
Reference:
Change or reset your PIN in Windows
If you're still experiencing issues, you can boot your PC in the Windows recovery environment screen and try some recovery options like System Restore or the Startup Repair method. (Select Automatic Repair and follow the steps)
Let me know if you still need more help.