Hello Madison,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
I am sorry that you are having trouble signing in to your PC. To fix the issue, follow the steps below carefully.
- On the Windows sign-in screen, press and hold the Shift key while you select Power > Restart.
- Upon reboot, select Troubleshoot > Advanced options > Select Command Prompt.
• In the Command Prompt window, type regedit and click OK.
• In the registry editor, select HKEY_LOCAL_MACHINE registry > Click File > Load Hive.
• Navigate to the C: drive of the local disk (where Windows is installed) > Select Windows > System32 > Config > Select the software file and click Open.
• Enter the key name 1234 and click OK.
• Now, expand HEKY_LOCAL_MACHINE\1234\Microsoft\WindowsNT\CurrentVersion\PasswordLess\Device
• In the right pane, double-click on DevicePasswordBuildVersion > Select Modify > Change the Value data to 0.
• Close Registry Editor and type exit in the Command Prompt window.
• Restart your computer and sign in with your Microsoft Account Password.
Credits - EmilyS_726
https://answers.microsoft.com/thread/97cabe77-3...
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.
Best regards,
Gunasekar N