Just switched to Mac this past week an I LOVE IT! But I still need to run some of my old PC programs so I figured I'd do a Boot Camp partition and use Parallels with it. Anyway upon install it asks if I want to format the partition as either FAT32 or NTFS. I chose FAT32 so I could read and write onto the Windows partition from the Mac OS, but now I'm wondering if that means the Mac partition is now susceptible to any Windows Viruses I might inadvertently pick up using the Windows partition. Also, if I'm using Parallels and the Windows side gets a virus, will the Mac OS again become susceptible to those viruses because both operating systems are being used. Thanks!