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1st Screen Lock is a password-protected desktop security utility that lets you lock your desktop with a password on boot, or at the time you are leaving your PC. You can use the built-in spy utility that works in background and enables you to spy on your PC users by fixing all user moves in a log file. This is very useful, when you need to know what your children or personnel do at the time you are away. Each user of 1st Screen Lock has its own password used to unlock locked PC. Password protection works in such a way that your users are unable to see user statistics, change options, or remove the program itself, they can only unlock PC using their own passwords. Try our password and security tools. Free downloads.