Look,..as long as a port is not open, you cannot be hacked. It is a physical impossibility.
That said, you if you run your firewall and only block ports 13x and 44x, then that close all known ports that you cannot shutdown.
You cannot get a virus without a file being planted on your computer. When you shut down ports 13x (NetBIOS ports) you have cut off the means to get a file into your computer from the Internet, unless you are downloading it yourself.
Shut that anti-virus program down when you play games. It is doing nothing but taking a large amount of cycles away from the game, and will false trigger on you from time to time, which will cause a CTD.
Isa,...please stop spreading this type of misinformation. It is not helpful.