I have a few macs and one PC on my network. THe PC is full of viruses and needs to have Windows reinstalled. Is there any chance a virus could go over my network from the PC and into one of my macs? I do not have file sharing or apple talk on. My firewall is on. Also, could the servers that gave me the viruses online remember my IP or whatever adress and affect my macs? FINALLY, are my contacts safe in Address Book? Thanks for any help.