By default, when a Windows 7 computer is locked, to unlock the computer, it is necessary to click username of the logged on session and then enter the user's password. Is there a configuration adjustment (preferably in Group Policy) that can be implemented so that it is not necessary to click the username first before entering the user's password. Alternatively, entering a shortcut on the keyboard would be sufficient. Any help would be much appreciated.

I do not know about this possobility. On the other hand I used GPO that blocks any user to lock computer. In my understanding this task is ambiguous, because of two computer users can unlock: the one that locked computer and administrator. Regards Milos

If the following Group Policy setting is Enabled, the logged on user is prompted to enter their password immediately after pressing CTRL + ALT + DEL on the locked computer. It is not necessary to click their username before entering their password. Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive Logo: Do not required CTRL + ALT + DEL