Do you like experimenting with computers? Do you often install programs from the internet that you're not sure is safe? Then I would like to recommend this.

This software installs a virtual Operating System (OS) within your computer. It is often used to experiment with new programs, or to learn how to set something up. For example - you have W7 and want to install TrueCrypt, but first you want to install it in a virtual OS to make sure you get it right before installing it on your actual computer. This prevents you from making mistakes on your actual computer - so its a really handy tool to have.