When I was receiving MICROSOFT UPDATE e-mails, they were
not e-mails from MS but virus/worm e-mails.
I contacted MS and they stated they DO NOT SEND e-mails
for UPDATES, your Internet Explorer has an Automatic
Update feature that will tell you when there are updates
available for you to retrieve.
These e-mails should NOT be opened, but deleted immediately
or reported to your network administrator to report these
accordingly.
These type of e-mails have been coming around with various
type of subject headers trying to trick people into opening
the e-mails. So beware!
JG