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I just received an email in my inbox that I suspected so I checked it out and sure enough the link would have lead me to downloading a virus!
The email tells you you need to update your Blogger (or blogspot) info but clicking the link will download the Storm Worm. If you want to deal with the Pop-ups I checked it out on snopes and you can read more here: http://www.snopes.com/computer/virus/storm.asp.
Bottom line is this virus is making it through the spam filters because the email from address used is no-reply@google.com(of course if you look at the headers in options you will see the originating ip is something like: 41.208.189.3 which is Africa and has now been blocked by our Advanced Spam filtering system but this email could also arrive in your Yahoo or any other mail service.
As always, if you get something from a company (even us) that asks you to click a link and go fix something don’t do it – instead go to your account with that company as you normally would and see if there are any real notifications in your personal admin area.