It appears that the rogue program, Windows Antivirus is now spreading via emails. Previously, the only way to get it was to click an internet link which took you to an infected site.
But the other day, one of my single clients received an email that appeared to be from a friend with a picture of a girl attached that he wanted him to see. He clicked the link to open the picture and was immediately hit with messages from Windows Antivirus telling him his computer was infected.
This is the first time I've seen an attack via email by the rogue program (though I suppose it was just a matter of time).
Make sure your antivirus software is up to date and if you haven't already, be sure to download and install Malwarebytes AntiMalware (one of the few programs that can successfully remove Windows Antivirus). In addition to these things, be careful not to open emails from people you don't know (especially if they contain links or attachments).