part of my job at work is to keep the AV system fully upto date. I also planned and installed it.
Believe me, if you don't have AV software install because it slows you down a bit or is slightly inconvenient then you are a danger to everyone you will ever come into contact with and a whole lot more.
I am still trapping emails being sent from joe home user PCs that are still sending out 2 year old viruses.
Not accusing anyone of anything here, but if you don't have AV installed and your machine blows up, you deserve everything that happens to you.
I will laugh all the way home ;D
Put another way, the defense that you don't use Outlook means nothing. Todays viruses have the SMTP server built in and reads its email list from your web browser cache, then happily floods the net with garbage from your pc.
Its a scary world out there boys and girls.