Avast! blocked a virus 7 times today.
(I share my computer)
The other person using it got a spam e-mail from someone they believed to be a friend (didn't check the address to tell, I did and it was spam), and they opened it. They got linked to a doctor's website about dieting and weight loss, and then left the PC away for upwards of ~6 hours. 7 blocked viruses were attempting to enter, according to the logs. I'm running a scan now, do I have a virus?