Found this on the Net
Q: What about Symantec? Why does Windows Security Center not detect the
status of Norton products?
A: Symantec’s product status architecture is unique among firewall and
antivirus manufacturers and requires a different approach to guarantee
detection of Symantec products. Symantec is in the process of developing
WMI providers and has plans to distribute the WMI providers to all active
customers shortly after Windows XP SP2 releases. The Symantec WMI
providers will enable full detection by Windows Security Center for active
Norton customers.
Without the updated WMI providers, Windows Security Center will detect
only whether Norton products exist. No status detection will be available.
You will receive a “red alert” message because Windows XP could not detect
an up-to-date and active antivirus program. For more information about
Symantec and Windows XP SP2, visit the following Symantec Web site:
http://www.symantec.com/techsupp/sp2/faq.html
(
http://www.symantec.com/techsupp/sp2/faq.html)
Microsoft provides third-party contact information to help you find
technical support. This contact information may change without notice.
Microsoft does not guarantee the accuracy of this third-party contact
information.
But Look in Here \HKey_LOCAL_MACHINE\SOFTWARE\MICrosoft\Security
Center\Monitoring\SymantecAntivirus
I then have a REG_DWORD key in there called DisableMonitoring with a value
of 1