Norton can't detect an old one?

I've created a ticket for the following.  Just trying to find out if I'm alone on this one.

 

The virus goes by the name win32.Agent.aazf.  It is a trojan that I believe has been around since beginning of 2008.

 

The computer symptoms was basically loss of internet (but not network).  Windows diagnostics report a corrupt winsock catalog.  Restart of computer brings everything back.  I thought at first it was a windows update gone bad....but wait....

 

Nothing much on the internet brought me to any conclusions, but for whatever reason, I downloaded Windows defender, ran a scan, and the trojan was detected and removed.  I work at a school where many workstations are now exhibiting the same characteristics.  On one infected machine, I downloaded AVG's free product.  Found the virus and deleted it.  No more symptoms.  Norton scan shows nothing.

 

Before you ask:

 

The version of Norton is a corporate edition - and on some machines, it's Endpoint.

Yes, the live update shows the latest rev's and definitions.

I went to http://security.symantec.com and ran their online virus scan (which should have nothing to do with what norton product I have installed).  It found nothing in a computer which had the symptoms and showed the virus present using one of the software products mentioned above.

 

I will certainly post any followup I have with the open case.  Not looking forward to sitting on hold tomorrow waiting for a tech.  If anyone has any clues, or has the same problem, I'd really like to know.

 

jmj