I am getting a new macpro come friday and plan on using bootcamp to install windows xp on a seperate hard drive. The thing is I have been using macs for so long I have no idea how to keep a windows machine safe from spyware, viruses and the like. Can anyone tell me what the must haves are in order to keep my machine safe? Is it possible for a virus to spread from my windows installed hard drive to my osx hard drive?