auto login

• HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Determines whether the automatic logon feature is enabled. Automatic logon uses the domain, user name, and password stored in the registry to log users on to the computer when the system starts. The Log On to Windows dialog box is not displayed.
https://technet.microsoft.com/en-us/library/cc939702.aspx

• Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"DefaultUserName"="Administrator"
"DefaultPassword"="Password"
"AutoAdminLogon"="1"
"ForceAutoLogon"="1"
https://stackoverflow.com/questions/21379759/how-to-automatically-logon-to-windows-7-using-a-password

• Autologon for Windows v3.01

https://technet.microsoft.com/en-us/sysinternals/bb963905.aspx