It seems that an attempt has been made by certain individuals to exploit Microsoft's patch Tuesday.
Hoaxers have sent an email infected with a trojan virus, disguised as a windows security update notification.
It asks the recipient of the email to run the attached windows update !!
If you receive this email please do not open the attachment,as it most certainly isn't from Microsoft.
Microsoft never send out security updates as email attachments,that's the the whole purpose of the windows updates website.
Here is a link with more information regarding this.