...quick and dirty

 

Windows 10 - Automatic user login

Usually you run netplwiz and disable the checkbox "Users must enter a username and password to use this computer".
BUT this didn't show up on my windows Dec 2020 release.

What helped was to change the reg key

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PasswordLess\Device

and set

DevicePasswordLessBuildVersion DWORD

from 0 to 2