In 9 years on the internet, I've only ever had one virus (actually a worm), and I didn't even know I had it until my son-in-law asked me about a message that was popping up on his email program every time he opened one of my emails - something to do with ActiveX control. I scanned, found the worm (along with it's name), got the instructions from symantec's site on how to eliminate it, followed them step-by-step, and that was it.
It took longer to find out from Symantec how the heck it got past my NAV in the first place, and what makes them think I should trust them to protect my computer now!! They explained how I should tweak my settings and I haven't had a problem since.
As far as I'm concerned, SPAM is much more annoying, but then I've never had a virus that actually crashed my system. Mailwasher helps with SPAM control -- it doesn't eliminate it, but at least you don't have to look at it!
Glenda
Glenda