Windows Server 2008 login screens can be annoying if you are used to Windows 2000/2003. While you won’t be able to revert to the classic interface, you can at least get rid of the switch user nonsense.
The following registry change, can be applied via local policy or domain level, by setting the value of dontdisplaylastusername to 1. The default is 0.
Computer Configuration > Security Settings > Local Policies >
Security Options > Interactive Logon: Do not display last user name
CAUTION: line wrapped for readability!
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\
CurrentVersion\Policies\System]“dontdisplaylastusername”=dword:00000001
Before registry change, when clicking on switch user button to login:
After change, when pressing CTRL+ALT+Delete
References:
jsbi.blogspot.com/2006/12/how-to-change-default-vista-logon.html
http://www.windowsreference.com/windows-vista/disable-fast-user-switching-in-vista/