Ahh Liz yeah you had that prob too?.. I had to visit another site with the same paragraph to copy it that way
Ysbird is making a good point.. the preview pane opens the email before you can avoid opening it.. which means with the latest email in the inbox.. all the html, Javascript code etc just loads
So.. for that (and reading all emails).. another option is to set your email inbox settings to disable html (read text only).. that way the nasty code that installs a virus won't execute and virus-ridden pictures and other files won't load.. they'll just be attachments instead
Norton is rubbish if you ask me, I've tried it two or three times in the past, and it never found anything.. but like Liz says it helps to run more than one anti-virus program.. they are like different doctors.. they can only detect viruses they know about / have learned / read up on (which is why updating them helps)
Like you say Liz, there are different types of virus/ virus combination, trojans, diallers, worms etc.. they can attempt to trick us in different ways (social engineering.. making it look as though a message / email came from a real person)