There are hundreds of articles on this subject, so I’m not going to spend any time on this. This is just for my own personal reference in the future.

Navigate to the following registry key:

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

Create/Edit the following keys as string values:

DefaultUserName
DefaultPassword
DefaultDomainName

Find the key “AutoAdminLogon” and set the value to “1”.