Hello. We have one pc at home and we don't use Wi Fi. The current configuration we have is the following: 1. Emisoft Internet Security Pack (Trial), 2. Malwarebytes Pro, and 3. DefenseWall We still use Windows XP Home. Can anyone say if a NAT router would be suggested? If so, the NAT router wouldn't replace the software firewall, would it? (I don't know much about Personal Computers). Thank you again.