Full version includes 1 year of updates from Symantec Symantec's Norton AntiVirus 2004 is the worlds most trusted antivirus solution. It protects email, instant messages, and other files by automatically removing viruses, worms, and Trojan horses. New built-in features also detect certain non-virus threats such as spyware and keystroke loggers. Protect your PC 24 hours a day with award-winning Norton AntiVirus. Features: NEW! Expanded threat detection alerts you to non-virus threats such as spyware and keystroke logging programs. NEW! Scans compressed file archives before you open them and risk infecting your computer. (Not available on Windows 98 or Windows Me.) Automatically removes viruses, worms, and Trojan horses. LiveUpdate downloads new virus protection updates automatically to protect against the latest threats**. Worm Blocking and Script Blocking can detect new threats even before virus protection updates are created for them. SYSTEM REQUIREMENTS Windows XP Home Edition/Professional 300MHz or higher processor 128 MB of RAM 85 MB of available hard disk space Windows 2000 Professional 133MHz or higher processor 64 MB of RAM 85 MB of available hard disk space Windows Me 150MHz or higher processor 32 MB of RAM 125 MB of available hard disk space Windows 98 133MHz or higher processor 32 MB of RAM 125 MB of available hard disk space REQUIRED FOR ALL INSTALLATIONS DVD or CD-ROM drive Internet Explorer (minimum version 5.01 SP2 required, 5.5 recommended Email scanning supported for standard POP3 and SMTP compatible email clients. Supported instant messenger clients: AOL Instant Messenger (minimum version 4.7 required) Yahoo! Instant Messenger (minimum version 5.0 required) MSN Messenger (versions 4.6, 4.7) Windows Messenger (minimum version 4.7 required)