How To Change The Way Users Logon To Windows 7

NOTE 1:

You must have administrative privileges.
NOTE 2:
This is only one of several methods of accomplishing this task.
1.
From the Start menu, select Control Panel.
2.
Select System Maintenance.
3.
Select Administrative Tools.
4.
Select Local Security Policy.  This will open the Local Security Policy editor.
5.
In the Local Security Policy editor, you will see two panes, one on the left with tree-view navigation and one on the right which will have the actual definitions and items to edit.
6.
On the left side, open the item labeled Local Policies.
7.
Select Security Options.
8.
Switch to the right pane and Double-Click the item labeled Interactive Logon Do Not Display Last Username.
9.
Place a Checkbox in the Enable box and Click enable
10.
Restart Windows 7 and you will be prompted for both a username and password.

 Nguồn: "http://mark.candleshoreblog.com/2009/01/26/how-to-change-the-way-users-logon-to-windows-7/"