A good trick to prevent uncontrolled output of e-mails from your computer :

Add a new e-mail address to your list, named !!!000. This is an invalid address but Outlook Express will allow you to enter it. It is automatically placed first in the list. As soon as a virus opens the list and tries to start sending mails, it produces the error "invalid address" and is stopped.

If you actually want to send email to all your list, you can withdraw that address and reenter it afterwards. But please don't do it, you may hardly find a reason for massive e-mails, which are most annoying, are a good vehicle for worms and viruses, and could disclose hundreds of private addresses to the cyberocean full of pirates.

Unknown senders or suspicious subjects: DELETE them without reading, EVEN when they don't include attachments. Update to Outlook Express v6. Set preferences to "downloads deactivated". Use a firewall like ZoneAlarm, check your disk with Ad-Aware spy detector (www.lavasoft.org).Make frequent backup copies, and pray.

Un abrazo - Andrés (paranoid ? me? )