Nothing is free, you pay for it one way or another.
Anti-v is unnecessary, it's proliferation is a result of a concerted and highly successful fear campaign targeted at ignorant users of which the world is full to the brim and overflowing.
That's just a load of bull****. No matter how careful you are, **** happens. You don't need top-of-the-line, expensive security, but a good, free anti-virus program is advisable to have. --- 3570K (4.8 GHz) | Dual-X 7970 | ASRock Z77 OC Formula | Corsair Vengeance 2x 4 GB | WD Black 1 TB | Corsair TX750 | XSPC Raystorm 750 RS240 Kit | NZXT Phantom