As a word of warning:
One general class of virus will infect someone's computer, find their address book, and send e-mail to the people listed in their address book. So you end up getting virus messages that appear to be from people that you know. Usually something like 'open up this great picture' or 'I've sent you an e-card.'
A particularly nasty subclass is a _virus warning_ going on in glowing terms about how bad the particular virus is. Fortunately your 'friend' has sent a program to help 'protect' you from the virus. The attachment itself is the virus. Click on it and you are toast.
-Jon
