How to Hide Files Inside An image...!!!

Hii friends here i am with an awesome trick by which you can hide your private & personal files in an image.When someone else uses our pc or laptop we dont want that they should see our private & personal files but we fail to do that.As i am sure all of us have some data which we want nobody else to see.

Here is a short & simple way by which you can hide your private files inside/behind an image.
In this tutorial i am using an pdf file you can use any file you wish.

To try thi should have winrar software(any version) & i hope all of us have it.