1. /
  2. Security Response/
  3. Download Virus Definitions/
  4. Norton AntiVirus for Windows XP/Vista/7/8

Norton AntiVirus for Windows XP/Vista/7/8

As new threats emerge, Symantec immediately builds new protection updates and makes them available for download on a subscription basis. If your subscription has expired, click here.

Choosing the right definition set
To choose the correct definition set, you need to know the product name and version, and whether the operating system is a 32-bit or 64-bit version.
How to find out if you are running a 32-bit or 64-bit version of Windows
How to find the name and version of your Norton product

32-bit Platforms

The following definition sets are suitable for 32-bit operating systems only.
File Name Creation Date Release Date File Size MD5 | all
20150420-002-v5i32.exe | FTP 04/20/2015 04/20/2015 527.56 MB 05927294426F5CD0BA73F75A586D35FB

Supports the following versions of Symantec antivirus software:

  • Norton AntiVirus / Norton Internet Security (later than 2012)
  • Norton AntiVirus / Norton Internet Security 2008/2009/2010/2011/2012
  • Norton 360 (later than 6.0)
  • Norton 360 version 2.0/3.0/4.0/5.0/6.0
  • Norton Security
  • Norton Security with Backup
  • Symantec Endpoint Protection 12.1
  • Symantec Endpoint Protection 12.1.2 and later
  • Symantec Protection Engine 7.x for Windows
File Name Creation Date Release Date File Size MD5 | all
20150420-002-i32.exe | FTP 04/20/2015 04/20/2015 628.38 MB 31A68657BC0DBC5C4C1F112F21486134

Supports the following versions of Symantec antivirus software:

  • Norton AntiVirus / Norton Internet Security 2007
  • Norton 360 version 1.0
  • Symantec Mail Security for Domino v 7.x
  • Symantec Mail Security for Microsoft Exchange (32-bit)
  • Symantec Scan Engine 5.x for Windows
  • Symantec AntiVirus for Caching/Messaging/NAS for Windows

64-bit Platforms

The following definition sets are suitable for 64-bit operating systems only.
File Name Creation Date Release Date File Size MD5 | all
20150420-002-v5i64.exe | FTP 04/20/2015 04/20/2015 530.44 MB C002625A38DB4CA071CF93DB252B2D85

Supports the following versions of Symantec antivirus software:

  • Norton AntiVirus / Norton Internet Security (later than 2012) for 64-bit OS only
  • Norton AntiVirus / Norton Internet Security 2008/2009/2010/2011/2012 for 64-bit OS only
  • Norton 360 (later than 6.0) for 64-bit OS only
  • Norton 360 version 2.0/3.0/4.0/5.0/6.0 for 64-bit OS only
  • Norton Security
  • Norton Security with Backup
  • Symantec Endpoint Protection 12.1 for 64-bit OS only
  • Symantec Endpoint Protection 12.1.2 and later for 64-bit OS only
  • Symantec Protection Engine 7.x for Windows (64-bit)
File Name Creation Date Release Date File Size MD5 | all
20150420-002-i64.exe | FTP 04/20/2015 04/20/2015 631.34 MB 70C8460FD6B28B0F68717D47CAA73BCC

Supports the following versions of Symantec antivirus software:

  • Norton AntiVirus / Norton Internet Security 2007 for 64-bit OS only
  • Norton 360 version 1.0 for 64-bit OS only