Malicious email purporting to be from Microsoft Software Update Centre

[#1]

I know you guys are pretty savvy but thought it worth mentioning that I received an email today claiming to be from (from memory) Microsoft Software Update Centre saying that an urgent security update to all version of Windows can only be accessed via a link in the email as the Update Centre on the Microsoft website has been infected. The email includes a .exe file as an attachment which I presume is stack full of malware. Just do like I did and delete the email
Cheers
Rob

[#2]

Mines was Quarantined

Quote

The item(s) in question picked up by the service was: *       BackDoor-BAC.gen and was sent to you from: *       "Microsoft" <customerservice "At" microsoft.com> The subject line of the mail received was: *       Security Update for OS Microsoft Windows

[#3]

I received two of these yesterday and 14 so far today.
All picked up by PlusNet