This week we have tested VirtualBox: a multiplatform virtual machine for x86 machines which allows you to test an OS from a simple .iso image. VirtualBox is easy to install and, just following the instructions contained in its interactive menus, you can setup your virtual OS in few minutes. We strongly recommend to be careful when you decide the quantity of RAM for your virtual OS. It is better to well balance it with the total RAM of your PC. When configuring the virtual HD for your OS it is better to select the "Dynamically Expanding Image" option. By doing this, your virtual OS will use all the hard disk it needs when in use. Last but not least, VirtualBox has a specific virtual USB controller which allows you to connect any USB devices to your virtual machines without installing specific drivers. Strongly recommended for all that people who like to test new OS without formatting their HD each time!