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Top 5 deadliest viruses

Watch CNET Top 5 and you could win a CNET fleece.

In the wake of the Conficker worm, we dug into our research vault, known as the Web, and ferreted out the five deadliest computer viruses/worms of all time. Turns out all we needed to do was read the London Times. And all they needed to do was ask a security company.

Now playing: Watch this: Deadliest computer viruses

It goes without saying that you should watch the video to see what the Top 5 are. But you have another incentive: for this week we are giving away a size-large throwback CNET fleece, as modeled in the video by Intern Chris Knox and Producer Sarah Harbin.

Watch the video, then come back here and answer the trivia question. If you are one of the first 10 people to get it right, you have a chance to win the fleece. Best of luck!

P.S. If these five PC viruses give you the chills, check out our favorite freeware antivirus and other security picks in CNET's Security Starter Kit.