I've installed BootCamp on my Mac Pro and use XP to play games (F.E.A.R., Tiger Woods 2007, Sid Meier's Pirates so far). I don't use the web browser or e-mail. Do I need A/V or spyware detection software? If I play the games above online (I haven't yet) is there a way for malicious software to get on my computer? I download a lot of live shows (.mp3 or .flac) from archive.org. Should I virus scan those before playing them in Windows? What else should I be thinking about? I haven't had any virus software on my Mac ever and haven't had problems as of yet (knock on wood)!