Bit Defender and Nod32 are hands down the best antivirus programs, that the average user will never know about.
I use Bit Defender now since my Nod32 ended, but I'm thinking about going back to it, I didn't have SINGLE virus with Nod32, and I actually didn't have to reinstall my OS for 6 months straight, and I used to reinstall every other month.
ESET created a great product with Nod32, love it.
These are not free, but, you get what you pay for, and these are worth it if you have money, if not, why are you on a trading website, hehe.