Port Locker is a data leakage prevention software which can lock or block all the ports of a computer system. Users can configure the port locking option by choosing single or multiple options as per their requirement. After installation of the software if someone wants to use the locked port, the tool immediately gives alert. Computer system has so many ports like USB (pen drive, flash drive and memory card), DVD/CD writer, PCMCIA ports, Wi-Fi, Network, Infrared ports, Ethernet ports, printer ports etc; all kinds of ports can be locked by this application. Ports are generally used for the purpose of data transfer from one system to another and therefore viruses enter into the computer system through external devices. Therefore, the port locking utility provides security to our important files form virus attack or data theft which are reside in the computer system. User of the system may block the ports permanently by choosing the permanent block option or can block temporarily by setting certain time duration in schedule block. By this software one can block the file distribution through email forwarding or uploads through FTP onto internet sites and blogs.