Freeware Antivirus

I think I'm getting good at finding free stuffs on the net.. I found a pretty good antivirus that offers really good protection without limitations for free.. They actually have another enterprise something version which you will have to buy but the free one offers the same protection as the paid one.. I tried it and replaced my old antivirus and I'm very much satisfied cause it detected and deleted a password viewer something virus, a heuristic type virus, and a worm which 2 of my old antivirus never detected, although the other one detected the worm it can't seem to