When i tried to download the update from http://wormsarmageddon.team17.com my Norton Internet Security stops the update from installing and says that it is unsafe. I disabled my Norton to download the update and it worked but then my computer said it scanned and found a virus and when i remove the virus it removes the update. Why does the update have a virus! :( please help me!

It doesn't. Your virus scanner is giving you a false positive. You can safely ignore it.

Why does the update have a virus! :(

Because Your protection software is "wonderful"!

Norton software is the worst software existing, while it's very CPU intensive.

Check the name of the virus in question, it likely contains the 3 letters GEN or the term heuristic, both of these refer to the virus scanner effectively performing an "educated guess".

The best AV is Brain 1.0