Norton AntiVirus 是一套强而有力的防毒软件，它可帮你侦测上万种已知和未知的病毒，并且每当开机时，自动防护便会常驻在System Tray，当你从磁盘、网路上、E-mail 夹档中开启档案时便会自动侦测档案的安全性，若档案内含病毒，便会立即警告，并作适当的处理。另外它还附有「LiveUpdate」的功能，可帮你自动连上 Symantec 的 FTP Server 下载最新的病毒码，於下载完后自动完成安装更新的动作。

诺顿杀毒软件的病毒库升级程序，适用于32位Windows PC/Server平台的诺顿旧版本系列产品:

Norton AntiVirus 2003 Professional Edition 

Norton AntiVirus 2003 for Windows 2000/XP Home/XP Pro 

Norton AntiVirus 2004 Professional Edition 

Norton AntiVirus 2004 for Windows 2000/XP Home/XP Pro 

Norton AntiVirus 2005 for Windows 2000/XP Home/XP Pro 

Norton AntiVirus 2006 for Windows 2000/XP Home/XP Pro 

Norton AntiVirus 2007 for Windows XP Home/XP Pro/Vista 

Norton 360 version 1.0 for Windows XP/Vista 

Norton AntiVirus for Microsoft Exchange (Intel) 

Symantec AntiVirus 3.0 CacheFlow Security Gateway 

Symantec AntiVirus 3.0 for Inktomi Traffic Edge 

Symantec AntiVirus 3.0 for NetApp Filer/NetCache 

Symantec AntiVirus 9.0 Corporate Edition Client 

Symantec AntiVirus 10.0 Corporate Edition Client 

Symantec AntiVirus 10.1 Corporate Edition Client 

Symantec AntiVirus 10.2 Corporate Edition Client 

Symantec AntiVirus for Bluecoat Security Gateway for Windows 2000 Server/2003 Server 

Symantec AntiVirus for Clearswift MIMESweeper for Windows 2000 Server/2003 Server 

Symantec AntiVirus for Microsoft ISA Server for Windows 2000 Server/2003 Server 

Symantec Mail Security for Domino v 5.x 

Symantec Mail Security for Microsoft Exchange v 5.x 

Symantec Mail Security for SMTP v 5.x 

Symantec Web Security 3.0 for Windows 

Symantec AntiVirus Scan Engine for Windows