Disabling the Windows 7 Welcome screen can provide an increase in security for logging into the computer, as someone who steals a laptop isn’t presented with a list of all possible users.
Unfortunately, you cannot hide the list of all users in Windows 7 Home Premium, but you can in Professional and above.
Disable the Display of All User Accounts on login
To increase login security, you can also force the user to press CTRL+ALT+DEL like older Windows versions required.
Enable Control + Alt + Delete for Windows 7 or Vista
This link also listed a couple other registry settings that I have not tried yet, but will soon.