I have somehow messed up signing in settings. Lost pin.

Try these steps from the Windows sign-in screen:

1. Select Sign-in options and switch from PIN to Password.
2. Sign in with the password for the Microsoft account used on the laptop.
3. If the password is also forgotten, use I forgot my password on the sign-in screen, or recover the account here: Recover your account.
4. If the PIN option is available, select I forgot my PIN and follow the prompts to reset it.
5. If verification codes are required and the usual device is unavailable, select Sign in another way and use an alternative verification method if one was set up.
6. If none of the above works, restart the device. If updates are pending, use Update and restart.

Important:

• Microsoft support cannot retrieve or bypass a lost or forgotten password.
• If the Microsoft account username or password has stopped working, verify the correct email domain and spelling, and try any alternate alias or phone number on the account.
• If the account still cannot be found or recovered, use Contact support.

• User Account Access in Windows
• Troubleshooting PIN Login Issues on Laptop - Microsoft Q&A
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• Troubleshoot Problems Signing In to Windows
• Change or reset your Microsoft account password in Windows