LiveUpdate Blocked by StationarySelector.nib

We are running Norton Internet Security 5 for Mac (under Mavericks).  The Mac hosts a Win7 VMWare appliance client which contains Norton Antivirus.  Today Norton Antivirus within the WIn7 client started being blocked from live updates.  The mac host running NIS 5  is reporting that the Win7 Norton live update process is requiring a .nib file called StationarySelector.nib within the Mac Mail application.  Why would Norton Antivirus under Win7 require a Mac Mail file on the VMWare host computer?

 

Does anyone have any idea what is happening?

 

Thanks