In this tutorial we will see how to download a free trial version of Winrar, compressor tool used to reduce the size of files and folders and vice versa, and turn them with the .rar extension. With this software we will reduce the file weight in order to send them via mail or for not ocuppying much space on our computer. It works with all OS available at the moment, Windows XP and 7 included. Thanks to this tool you can even add passwods and comments to protect your files.