ctrl alt del login
Here is how to enable or disable the requirement to press CTRL+ALT+DEL when logging into Windows:
(Tested on Windows 7)
Open the Start Menu, then type regedit in the search box and press Enter.
In regedit, navigate to the location below.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
In the right pane, right double-click on DisableCAD.
To enable CTRL+ALT+DEL for Windows login, enter the number zero (0) for Value data.
To disable CTRL+ALT+DEL for Windows login, enter the number one (1) for Value data.
Close regedit.