Enabling secure logon in Windows will protect your system from Malware that attempts to impersonate a logon screen to steal system passwords. This forces anyone trying to log on to press Ctrl+Alt+Del first.
To do this in Windows 7/8/10, click the Start button and type in 'netplwiz' then press Enter. In the Advanced tab, check the box next to 'Require users to press Ctrl+Alt+Delete' then click OK.
In Windows Vista, open the Run command, type in 'netplwiz' then click 'Continue' when prompted by User Account Control. In the Advanced User Account window, click on the Advanced tab, then check the box that says 'Require users to press Ctrl+Alt+Delete'.
In Windows XP, go to the Control Panel's User Accounts applet. In the Advanced User Account window, click on the Advanced tab, then check the box that says 'Require users to press Ctrl+Alt+Delete'.
