System Locker is a handy utility that allows you to protect your personal computer from unauthorized access. You can use System Locker to restrict access to your PC. It's attractive, secure, and very easy to use. It starts automatically with Windows and optionally locks your desktop upon loading. It hides your desktop on system lock and provides an informative message to other users. You can set start / stop times for users to limit their access to your PC. Any action performed by System Locker is optionally recorded to log file and accompanimented with sound.
Main features of System Locker: secure mouse and keyboard input blocking, powerful startup and automation options, audit and scheduling features, resistance to brute-force password hacking, sound support, taskbar icon notification. | 
