Got an email telling you that you've been tagged in a photo on Facebook? Don't click on that link in the email to see the picture! It could download a virus to your computer.

According to Mashable.com, there's a new criminal running a sophisticated malware program targeted at the 139 million Americans on Facebook.

Here's how this one plays out: You get a notification email from what appears to be Facebook. But look closely at the link in the email and you'll see Facebook is slightly misspelled as "Faceboook" (with an extra 'o').

So when you get the email, first hover your mouse over the link and confirm the "Faceboook" misspelling. Then promptly delete it!

If you do click on the link, a virus is downloaded to your computer in 4 seconds. Then you're quickly redirected to the real Facebook page. It's so seamless that most people don't even notice anything is wrong. (If this has happened to you, be sure to see my Virus, Spyware and Malware Protection Guide for free fixes that can help when you're already infected.)

Be careful out there!