Always use classic logon

This setting forces the user to log on to the computer using the classic logon screen. By default, a workgroup is set to use the simple logon screen. This setting only works when the computer is not on a domain.

Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Microsoft\Windows\CurrentVersion\Policies\System
Value NameLogonType
Value TypeREG_DWORD
Enabled Value0
Disabled Value1

logon.admx

Administrative Templates (Computers)

Administrative Templates (Users)