Not sure what the OS is, but I suspect it is some variation of Linux. I will move this thread to the Linux section so the people who knows Linux better can help you. Last time I checked, Linux is almost virus free. So I don't think you need one, like Wanamingo says, don't do it. But that may change, so you better check with the experts on Linux forum.
Moving thread from Vista to Linux.
Linux experts, please help her. Thank you.