PC World posted a news story that Malware authors use Microsoft's schedule to con users

It's Tuesday, time for more security patches from Microsoft right? Not quite. It seems the malware crowd is exploiting Microsoft's routine of releasing fixes on Tuesdays and sending out fake security emails bent on infecting their targets with a worm.

Windows users familiar with Microsoft's modus operandi will sniff out this scam immediately, though, and not only because of the cracked English in the message. The missive contains the security update in an attachment. Microsoft never sends security updates in attachments.

  Worm Planted in Fake Microsoft Security Update