Note that microsoft still lists Symantec Anti-Virus Corporate Edition in
the list of software that XP SP2 inadvertantly disables.
The following is from http://www.symantec.com/techsupp/
Q: Will Symantec software be compatible with Windows® XP SP2?
A: Yes, although one feature of Service Pack 2, the Windows Security
Center, may indicate otherwise. By design, Symantec includes
tamper-protection features to make it difficult to scan the status of
its products. As a result, the Windows Security Center can detect the
presence, but not the status, of some Symantec security software.
Symantec is developing an update to ensure that the Windows Security
Center shows the status of Symantec products as green (on). This update
will be in the form of a product update for some products and as a
Maintenance Release for others. The schedule for updates and Maintenance
Releases appears on the the Product