The Pluto's SysLock application was designed to keep away the intruders while you're away.
When started this program will not allow anything to be done to the computer until the correct password has been entered.
All other programs will continue to run but there's no way to switch to them, the user will be locked out even if the computer are restarted the user will be locked out until the correct password is entered. Please note that error-proof restart will disable the program so it's not 100% safe.
If runned without parameters it will go into locked mode if the password has been set, the parameter /set sets the password first and THEN goes into locked mode.
NOTE: Free for non-comercial use