NOTICE: For non-proffesional editions, see the last step.
Step 1: Run & Search
Step 2: Enable it
Step 4: For non-professional edition users
Search or run the following to open the registry editor: regedit
Now, go to the directory HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Find and open the vaule "dontdisplaylastusername". Change the value to 1 and click OK.
To require users to press control-alt-delete on logon, open command prompt (search/run cmd).
Type in control userpasswords2 . This will open up user accounts. Make sure that "Users must enter a user name and password to use this computer" is checked. Go into the advanced tab. Under secure logon, check the box saying "Require user to press Ctrl+Alt+Delete". Apply and OK these settings.
Log off and you will notice these changes right away!