Lock My PC allows you to lock your computer with a password while you leave it for a time. It shows a lock screen, disables Windows hotkeys and mouse. You can use a hotkey or icon in the system tray to lock your PC. To unlock the computer you must enter correct password only. The program can log invalid entry attempts and has option to keep your PC locked even if power failure occurs or someone switch it off and on
News source: Lock My PC Homepage
Download: Lock My PC beta
This is BETA software!, please use caution when installing it on your system