Lock Computer
This will lock your computer. A window will popup and the mouse will be restricted to move only in it to enter the correct password. It will hide the system tray the taskbar, the entire desktop it will disable windows hotkeys ctrl-alt-delete, alt-F4, and all the others.

Lock computer when program or windows starts
When this is put to On it will lock your computer automatically when lock n safe or windows starts. 
It will hide the system tray the taskbar, the entire desktop it will disable windows hotkeys ctrl-alt-delete, alt-F4, and all the others.

Disable any exit from this program
When this is put to On it will remove all ways to exit from the program. Like from the file menu Exit and when it is in the system tray, when right clicked the Exit will be disabled also. 

Change the current password
This will let you change the current password. The user will have to provide the current password to change to a new one.

Start in system tray
Enable this option and when the program starts it will go in the system tray.

Log all attempts of unlocking
When enabled it will log all attempts when someone types a wrong password while lock n safe is in locked mode. You may also view the log file and delete it.