It appears the NAV 6/1/2006 virus definition update doesn't like OracleXE
(Windows XP Pro).

For those of you like me are not familiar with how to configure Norton
Antivirus, here's the simple fix:

Open NAV
Under Options, select 'Norton Anti-Virus'
On the left-side menu, select 'Internet Worm Protection'
Select the 'Program Control' option
Select 'Add'
Locate the OracleXE program in the file open menu...

etc.

++ mcs