If you're a Rogers subscriber, you can get Rogers/Yahoo-branded Norton Anti-Virus (and firewall) for free.
True, but I had already paid for the upgraded version when Rogers introduced their deal. Free is a good price, I have to agree!
Up until this year I had always used Norton AV. I have found, though, that the product tends to really bog down the PC over time. Not sure why that is exactly, but I'm presuming it has some kind of internal database that just gets larger and larger over time, with each scan.
Many large corps use the enterprise version of McAfee. I've been using it at home for a few months it seems to be a "lighter" AV than Norton with no gradual degradation in performance. I understand NOD32 is supposed to be the fastest and have the best detection rates, though.
the product tends to really bog down the PC over time
In a major way. I discovered that my regularly scheduled A/V scan had unscheduled itself sometime in the past month, so I had to run a full scan. It took over 40 hours.
Now, admittedly, this isn't a big, bad kick-ass machine — it's only a 3GHz box with 2GB of memory, so perhaps it's underpowered for a strenuous task like virus scanning. (Tongue ever so slightly in cheek here, of course.)
Well... I am coming to your house to play games, then.