Rule One: Don't do what you just did. Don't click on any link you get in email. You're lucky this time. There is no virus here. But you might not be so lucky next time.
Rule Two: Do not click on any link you get in email. (It bears worth repeating.)
Rule Three: Do not click on any link in a website unless you are absolutely sure that it is legitimate. And you can't be sure by what it looks like.
Rule Four: Do not click on any link you get in email from a friend who might have forwarded it from some place else.
Rule Five: Get a Mac.
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Want to be safe?
Do not do what you just did!