well right now i'm using zone alarm security suit, and i think u can get a free trial of this software.
anyways is does nearly everything automatically, scan, downloading updates, etc.
all u really need to do with it is say wether or not u want some programs to be able to acesses the net.
so i hope that i've been some help, but yeah check it out, and if u had 2 u can by it i think for $70 or something, so yeah.... thats my recomendations.
p.s i don't know that much about comps, so be sure to check it out first, don't take my word for it.