well, my musical son decided he can't wait until university to have a laptop...that he needs something to finish HS with all the AP courses, papers and presentations. So he went with his dad to purchase a Mac Pro. But since the rest of us have been PC folks, we could use recommendations for anti-virus and mal-ware for Mac Pro products. He's already spent his budget purchasing it, so if you have any highly recommendable free version we would appreciate the leads. Thanks in advance.