ive used alot, i remember @guard...
they change every year, if you keep up with their changes, youll see....
ive been with BitDefender, its average, good with games, GUI is easy, less problems, less frustration too.
my work gave out a copy of kapersky, its good, i rank it right with bitdfender. but with lower standards...
NOD32 is nice, but very very sensitive, not stop frustration trying to game with it, off or on.
good on a business pc, work...but for the average user, which does everything, its got issues
Trend Micro is ok
i use to use Zonealarm, but then i heard about the vulnerabilities, then i tested it, and i stopped using it, tru, all have security holes, didnt like ZA
....
i would just google some more...
for now i think BitDefender is good.nice GUI, easy GAME option..