Hi Ron
Think that sort of worm has been doing the rounds for a while and you've been lucky to avoid it until now.
I've recieved a few up until now... and i expect it to continue or even grow exponentially

Emails from Administrators are a sneaky way of trying to catch people out and if you opened it, you were lucky that your software was up-to-date.... best thing is NOT to open..... just delete.
The only time i let myself down was when i opened a hotmail account email from a friend that i couldn't preview and my last New Year's eve was ruined

Spent all night getting rid of the little sod... and the subsequent problems took days and i had to delve into my registry to fix what the worm and trojan had done

And then there are your friends who haven't been so careful and thanks to the mail worms they have, keep sending you copies of themselves.... and it's really freaky when you end up getting viruses from yourself because your friends have more than one account address for you

Had to get them to delete ALL my contact addresses.... or i would have had to kill them :p
The joys of worms... and cutting them in half and watching them wriggle regardless!