Help!My computer is acting unusual?

Well in my norton anti virus it says they found like 20 viruses but there is no action I can do,like to take the virus off.And now when I try to go on the internet,like Mozilla or explorer,it doesn't come out its seems to load but the page doesn't come up and my computer is starting to run task and programs pretty... show more Well in my norton anti virus it says they found like 20 viruses but there is no action I can do,like to take the virus off.And now when I try to go on the internet,like Mozilla or explorer,it doesn't come out its seems to load but the page doesn't come up and my computer is starting to run task and programs pretty slow.And I don't know how to get rid of the viruses?
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