How to lock and unlock your computer automatically

New technology makes life easier. That's what we want right? Have you wondered is there any app that can just lock off your computer without having to touch the keyboard? Well, there is. Thanks to the open source that makes the world such a wonderful place.  

BtProx ( http://btprox.sourceforge.net/) is a free application that monitors the proximity of your computer to your cellphone or other bluetooth device. It will lock off your computer automatically, protecting its contents  from prying eyes when the phone goes out of range which means you walk away from your computer. Obviously, you would take your cellphone with you when you leave, wouldn't you? It will also unlock automatically when you return back, with your cellphone or other bluetooth device of course. In addition, with BtProx, you can set up an arrangement that automatically locks your computer and turns on the PC security system when you step away from the machine.