Beware of Bogus Bulletins Claiming to be from Microsoft
These tricks are the latest craze - fraudsters sending emails claiming to contain patches and security updates that are in fact, thinly disguised adverts, or worse still, malicious worms or other nasties.
If you get an e-mail that claims to contain a Microsoft software update, it is probably a trick to try to get you to infecting your own computer by running it.
I'll say it once - Microsoft never widely distributes software in e-mail!
Learn how to spot the nasties at http://www.microsoft.com/security/antivirus/authenticate_mail.asp.
NOTE - Microsoft now signs it's security related emails using a PGP certificate so get protected and get yourself a free copy of PGP at http://www.pgp.com. Their PGP certificate is available for download at http://www.microsoft.com/technet/security/bulletin/notify.asp.
Also, in case you are in any doubt, Microsoft archives all bulletins at http://www.microsoft.com/security/security_bulletins/ so you can check them out.