Who
Hackers: Attack computers across the Internet, create 
viruses.  Usually young, bored men and boys.
Anti-Virus
FRISK Software International is a global 
software developer specializing in antivirus products, services and 
research since 1989.
http://www.frisk.is
F-Prot Antivirus for Windows US 
$25
Can be purchased and downloaded online. Advantage: Not commonly used so less rarely directly targeted for attack by viruses. Norton and McAfee are the big boys in this field.
http://www.f-prot.com/products/fpwin.html 
Firewall
Keep hackers and data thieves out of your computer with ZoneAlarmŽ, a PC firewall that blocks intrusion attempts and protects against Internet-borne threats like worms, Trojan horses, and spyware. Free to individual and non-profit users. Can be downloaded. Option to upgrade to Zonealarm Pro for more features.
http://www.zonelabs.com/store/content/home.jsp
Another option:
Norton AntiVirus Norton, Personal Firewall, $69.95. 
http://www.symantec.com/sabu/nis/nis_pe/
Virus information
http://securityresponse.symantec.com/
Klez: Fakes return address
Virus hoaxes
http://securityresponse.symantec.com/avcenter/hoax.html
Simpler 
way to detect a hoax: select ten words in a row, picking as unique a stretch of 
ten words as you can. Search for the words in Google. Google will 
turn up the URL of information on the hoax. There is no such thing as a free 
lunch. 
Other hoaxes
Urban Legends
http://www.urbanlegends.com/
Chainmail
http://www.breakthechain.org/
http://www.breakthechain.org/exclusives/arlington.html
My 
own favorite chain-breakers:
http://www.breakthechain.org/awards/0005.html
http://www.breakthechain.org/awards/0109.html
419 Fraud
http://www.419Fraud.com
You are not 
special. No one wants to give you any money.
Spam (Unsolicited Commercial email)
http://spam.abuse.net/
Delete | Never 
respond | Never click on "remove" - Spammers lie.
Privacy
Company email is not private
Instant Messengers
Security risk exposure.
Security means, in brief