To protect your self, backuping up your PC before infected by virus. If your email start sending out virus to others, change your email account's password right away, remove virus, and warn those people that are in your address book via the other email account from a different computer. If you only have one email account, create another one with the other company. Mind you that anything you sent will no longer be secret. Most likly you will discover your own personal email on a search engine such as Google.com one day.
Check out Long Live the Web - by the Tim Berners-Lee who invented World Wide Web.