For everything from help and advice on how to remove viruses from your computer to reviews of the best anti-virus software on the market, InterVirus.co.uk is your one-stop reference guide to viruses, worms, trojan horses, adware, and spyware.

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Top 10 World's Worst Viruses

10. Code Red
Grabbed random files and send them out to email addresses ... more >>

9. Sircam
Among the first of the 'network worms' to spread rapidly, infecting hundreds of thousands of computers ... more >>

8. Benjamin
New breed of worm, targeting users of the then popular file-sharing program Kazaa  ... more >>

7. Anna Kournikova
Unleashed as an embedded attachment in an HTML email message that would execute as soon as the recipient opened the message ... more >>

6. Nimda
Spread by email attachment, claiming to be a picture of Anna Kournikova, which many recipients struggled to resist ... more >>

5. Magistr
monitored the inbox of the infected computer and spread by sending automatic replies to senders ... more >>

4. Explorer.zip
sent nonsense email messages to everyone in the infected user's address book, attaching random files from the user's hard drive ... more >>

3. Melissa
Copied itself to the first 50 email contacts in the user's address book and spread throughout the world within a matter of hours  ... more >>

2. Klez
Grabbed email addresses from a victim's address book, mixed and matched these addresses to create new senders and recipients ... more >>

1. Loveletter
The most damaging virus to date, infecting millions of computers worldwide ... more >>