I recommend you uninstall Norton AntiVirus via the Add/Remove Programs
applet in the Windows Control Panel then manually delete the "C:\Program
Files\Common Files\Symantec Shared\VirusDefs" folder. Restart the
computer, reinstall NAV then update the virus definitions via LiveUpdate or
by downloading and executing the Intelligent Updater.
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Regards,
Joel Cook
Symantec Corporation
Please continue to post your messages in the public discussion groups since
Symantec does not provide support via private e-mail.