You can easily copy data from your friend's computer to with out knowing him/her. This trick can help you to do this kind of task, and you don't need any kind of internet support for this task and also don't need any kind of new technology like Bluetooth, Infrared etc. You can do this task by just a little notepad trick also need some codes for this job, and I will totally work very smoothly.
This Trick could prove to be very helpful and it would Copy and Steal all the Data without the Confirmation and Knowing of Computer Owner.