Download Virus Definitions

To receive the latest antivirus definitions, please select a language and product below.

Click here to find out how to purchase and activate virus definition subscriptions.




Norton AntiVirus for Windows 2000/XP/Vista

Endpoint Protection
Symantec Endpoint Protection
Symantec AntiVirus Corporate Edition

AntiVirus for Gateways
Symantec Web Security
Symantec AntiVirus Scan Engine
Symantec AntiVirus for Gateways

AntiVirus for Groupware
Symantec AntiVirus/Filtering for Domino
Symantec Mail Security for Domino
Norton AntiVirus for Exchange
Symantec Mail Security for Exchange

AntiVirus for Macintosh
Norton AntiVirus for Macintosh
Symantec AntiVirus for Macintosh

AntiVirus for Handhelds
Symantec AntiVirus for Palm OS
Symantec AntiVirus for Handhelds


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Latest Definitions

Multiple Daily Updates   Learn More
Symantec Endpoint Protection 11
Norton AntiVirus 2008 and newer
Virus Definitions created July 5
Virus Definitions released July 5
Defs Version: 100705r
Sequence Number: 83242
Extended Version: 7/5/2008 rev. 18
Total Detections (Threats & Risks): 1883749

Daily Updates   Learn More
Symantec AntiVirus
Norton AntiVirus 2006/2007
Virus Definitions created July 5
Virus Definitions released July 5
Defs Version: 100705c
Sequence Number: 83233
Extended Version: 7/5/2008 rev. 3
Total Detections (Threats & Risks): 1883729

Weekly Updates released July 2   Learn More

Norton AntiVirus for Mac Defs released June 26

Symantec AntiVirus for Handhelds Defs released June 16


Certified Intelligent Updater
The Intelligent Updater virus definitions are fully tested and certified by Quality Assurance. Intelligent Updater is an alternate delivery method for certified definitions, which consists of an executable file that can be downloaded and run manually.

How to use Intelligent Updater

  • How to update virus definition files using the Intelligent Updater

    • Trouble Shooting

  • Error: "The intelligent updater program is corrupted or has been modified. Scan this file using your Symantec product containing virus protection to make sure it has not been infected with a virus."
  • Error: "This package is not signed with a valid Symantec Signature..." when running the Intelligent Updater or Rapid Release
  • Error: "Program too big to fit in memory" when running Intelligent Updater
  • Error: "Your virus protection cannot be updated" when running the Intelligent Updater
  • Error: All updates failed to install on the machine. For more details about the processing, please check the log file "Log.IntelligentUpdater.txt" created in the user's temporary directory." ..when running Intelligent Updater.


    • Intelligent Updater vs. LiveUpdate: Click here for information.
    Important information about changes to Intelligent Updater.