About a year ago I discovered someone was tracking my movements by reading my email, so I began installing protective software: OnTrack, Pest Patrol and Zone Alarm Pro. PP caught and deleted one worm. However, the problem persists. I have both MS Outlook Express and Hotmail.

I'm wondering if it's worth upgrading my worm /Trojan horse detection software to catch more sophisticated worms, or if this person is now using some other approach to reading email. Can you hack email by some other means, crack the password? How can I identify who is doing this?

Your expertise will be most appreciated.