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