My wife and I have both gotten the Klez virus (or whatever it's called) on our computers this week.
I just installed Norton Anti-Virus and got all the updates. When I ran it, it found a virus in the system that it cannot remove. It isolated it until I can "deal with it".
Normally all our e-mails run through my wife's computer, and her Norton software eliminates this stuff. She updates her Norton constantly, but it did not help this time.
I did not open any e-mails on my computer. I just accidentally hit the email button this morning, and by the time I was able to shut down the e-mail program, it had downloaded a couple e-mails to my computer. I didn't open them to read them. I just brought up the e-mail program this evening to delete whatever was there and then installed Norton.
Aparently you don't have to open these to get infected. Just downloading them does it. We have been getting three or four of these every day all week. I'm guessing a lot of people have been.