Is avira and malewarebytes enough security on my computer?

I have avira and malewarebytes installed on my computer, I was wondering if thats enough securtiy or should i install more progs like zone alarm?

30 Years: The Top Five Milestones of The IBM PC – Toms Hardware

If we were to look at pure computer, the IBM PC was hardly the first … The first virus in the wild was Elk Cloner and was written in 1981 to attack Apple’s DOS 3.3 OS. The term virus was coined in 1984 by Fred Cohen. However, the first PC virus did …
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is there any other way to get around school computer security?

my school has this stupid thing and almost every proxy doesnt work on our school computer except for one www.whitefox.org but i dont want to use it cuz they spy on our stuff and stuff like that and u get OSS for using a proxy site. anyone know any good command prompt things or any other ways to get around it other then using proxy’s so if they catch me i can pull out the hand book and say… U ONLY SAID NO PROXY’S