Just how good is Vexira? I'm running McAfee and while it seems to
work ok there are some system load issues that I've run into. Tried
Norton - that's why I use McAfee.

So just which is the best. My criteria include:

-- Best at finding and stopping virus,
trojan horse, worm, and any other attacks.
-- Timely updates
-- Simple/easy updates
-- Low system load