To Create A User Account Invisible
This tweak takes into account the fact that you usually see the welcome screen to hide. You can access using the account you should use the Log On to Windows dialog box similar to Windows 2000.
[Start] [Run] [Regedit]
Registry key: HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon \ SpecialAccounts \ UserList
Edit / Create value data type (s) and Value Name (s) as described below
Data Type: REG_DWORD [Dword Value] Name / / Value: Type the account name to be hidden
Setting for Value Data: [0 = Account is Hidden / 1 = enabled]
Exit the Registry and reboot .