Symantec's Norton AntiVirus 2004 is one of the world's most trusted antivirus solutions - now with expanded detection of both known and emerging threats. Norton AntiVirus removes viruses, worms, and Trojan horses from email messages, instant message attachments, and other sources automatically-without interrupting your work. Now it can also find viruses in compressed file archives before you open them, reducing the risk of infecting your computer. New built-in features even detect certain non-virus threats such as spyware and keystroke loggers that can steal personal information and leave your computer more vulnerable. Protect your PC 24 hours a day with Norton AntiVirus 2004.