I use a firewall called Comodo. Nice, free, good on system resources. Works.
Google for it.
I would also recommend getting AVG or another free virus scanner.
Maybe ad-aware too.
Hope that helps.
Online Gaming and so much more
http://www.quantumraiders.com/forum/
http://www.quantumraiders.com/forum/viewtopic.php?f=15&t=10599