I don't have a clue - but it is strange that you would get two (2) "scan with Norton's antivirus " options in the same drop down menu. Ya got me confused now - I'll be watching this thread closely!
Well after looking at it again - does the hilghighted one have something to do with winrar only? -- As in scan the winrar file for virus - like before it is uncompressed? Forget - I think I am still confused!