Why should i use this and what does it do ? You should use this is most cases when downloading unknown applications, since its never 100% trustworthy. Viruses, Trojans, key loggers etc.. may be encrypted inside the downloaded file(s). This program allows you to create a virtual "Sandbox". It's basically a room with no doors or windows. [completely sealed] You cant get anything in or out. You cant see things outside and neither can they see you. This allows you to basically do anything within the "room" without consequences . Hidden Content: You must 'reply' before you can see the hidden content. * It's never 100% virusproof, but this is the best you can do against it (along with your default Antivirus Protection).