.dll file error in outlook

Tech-Archive recommends: Speed Up your PC by fixing your registry

From: Floradee (Floradee_at_discussions.microsoft.com)
Date: 07/07/04 

Date: Wed, 7 Jul 2004 16:38:01 -0700

A few days ago I upgaded our anti-norton virus to 9.0. Since then I've been getting an error when opening my Outlook " The add-in "C:\Program Files\NavNT\vpmsece.dll" could not be installed or loaded. It tells me the problem maybe be resolved using detect and repair on the computer, that hasn't worked.
I see that file in my symantec folder I'm not sure how it relates to my Outlook though.
Any suggestions would be great!