No, it is not. I just received the same audio message, ostensibly from "Microsoft Security Essentials
".
The smoking gun? Microsoft Security Essentials is not installed on my computer; I am using "Avast Free Antivirus" on this system. The URL in my case (just a sub-string of it): ... /crt/uk_seg0303/micr_essen1_3723/index ...
There appears to be a country-specific element to this scam, hence the "??_seg" string in the URL.
This seems to be quite an aggressive attempt; it would be good to get some authoritative input on this...
I just tried this same URL on my BlackBerry (which is definitely not running Microsoft Security Essentials :) ) and
received the same aggressive popup, and the same background image as on my desktop. Clearly a scam site.
Patrick