An Extra.DAT file is not applied if the Extra.DAT file has expired. The expiration date can vary, depending on the following:

• The source of the Extra.DAT
  And
• The version of DATs currently in use on the client.

To make sure that, you have the most current Extra.DAT:

1. Verify what version of the .DAT files you are running.
   
   See KB51722 for information about how to determine version information for VSE 8.x.
    
2. If your version is not current, download the latest DAT or SuperDAT files:
    
   • DAT file download location: http://www.mcafee.com/apps/downloads/security-updates/security-updates.aspx?region=uk#tab-dats
   • SuperDAT file download location: http://www.mcafee.com/apps/downloads/security-updates/security-updates.aspx?region=us#tab-superdats
      
3. Apply the Extra.DAT locally. See KB50642.