I keep getting email messages returned to me, but I never sent such a message. Does this mean I have a virus?

Answer: No. The majority of email worm viruses in circulation forge the return address field of the infected messages they send, using an email address found on the infected computer. You are receiving the bounce messages because, on an infected computer, your email address was found and used by the virus to forge the return address. You will likely continue to receive such messages until the person with the infected computer realizes it and removes the virus. Nonetheless, there is never a bad time to make sure that you have up-to-date antivirus protection on your computer and to scan your system for known viruses.