Hi there! Just to add up on the steps provided by AI. I suggest to also try to disconnect your device from the internet. If your device keeps forcing the PIN setup, disconnecting Wi-Fi or unplugging Ethernet, before restarting the PC can sometimes fix the issue.
If you still can't get past the screen, boot into Windows Recovery Environment and try Safe Mode. From the sign-in screen, hold Shift while selecting Power > Restart, then go to:
Troubleshoot > Advanced options > Startup Settings > Restart > Enable Safe Mode
Once in Safe Mode, try if you can sign in normally with your password.