well dude you can also try Ragnarok Online. It has got many servers around the world (Official server & Private server). The Official servers are mostly paid server that means you have to pay to play on those servers while the Private servers are mostly free servers. You dont have to pay to play on those servers.
well i dont think that Norton would be a good choice, since it consumes a lot of resource of your system. McAfee is pretty good, but it also consumes lot of resources but not as much as Norton. well i would recommend Kaspersky antivirus. It is good as McAfee & pretty light. You can also try NOD 32, but it is not free as Norton, Kaspersky or AVG.