How to hide users from the Windows Server 2008 (Vista) welcome screen
When you have added a few local users to Windows Server 2008 for example to use for authentication on shares you don’t want to see these users in the welcome screen.
These users won’t be used for logging in on the desktop. So you want to hide these users. To do this you can add the following reg key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList
Add a DWord key with the name of the user. When setting the value to 0 the user will be hidden. When set to 1 the user will be visible on the welcome screen.

