Symantec Security Response - Download Virus Definitions

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.

Latest Definitions

Multiple Daily Updates Learn More
Symantec Endpoint Protection 11
Norton AntiVirus 2008 and newer
Virus Definitions created August 21
Virus Definitions released August 21
Defs Version: 100821q
Sequence Number: 84964
Extended Version: 8/21/2008 rev. 17
Total Detections (Threats & Risks): 385302

Daily Updates Learn More
Symantec AntiVirus
Norton AntiVirus 2006/2007
Virus Definitions created August 21
Virus Definitions released August 21
Defs Version: 100821q
Sequence Number: 84964
Extended Version: 8/21/2008 rev. 17
Total Detections (Threats & Risks): 385302

Weekly Updates released August 20 Learn More

Norton AntiVirus for Mac Defs released August 15

Symantec AntiVirus for Handhelds Defs released August 20

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.