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In this paper, a human computer interface using hand gestures or any hand signal is introduced. This system is enhanced to replace the use of computer mouse with any hand signal instead of using any face expression. The system track the users hand movements with a webcam to displacement of the mouse cursor and users any hand sign is used to translates them into mouse click events on computer screen. Along with this system we also introduce facial authentication for privacy before some movements are introduced. Finally the system thus eliminates the direct contact with the mouse. Hand Motion Detection is used in various aspects and the results have been tremendously gathered. So HCI profound to be used in virtual basis and important techniques can be gathered.