This program disables Windows system key combinations, such as Alt+F4, Ctrl+Alt+Del, Alt+Tab and WinKey and then shows security screen over your desktop that would not let anyone except you in without the proper password.
Once the system keys are disabled, it is not possible to switch to another application, run a program or try to kill Active Screen Lock using Task Manager. Even if the Reset key is pressed on the computer chassis, the application will still be blocking access after computer reboots. All access attempts are logged in background, so that you can see whether there has been an intrusion attempt while you were away. The log file itself is encrypted. Besides being secure, Active Screen Lock allows you to display a clock and even custom image slideshow on the lock screen.