I am getting the OS installed right now using virtualbox. Do I need to install antivirus and run all the windows updates to protect it or how does that work? Same rules apply I figure since it will be able to get on the internet. I just put avast on there. One thing that is confusing me is how to transfer files between the two places. It seems windows cannot see the mac's file system. For what I want to do (use a windows based file comparison tool) this is the primary reason I am trying to set this up.