You might try navw32.exe /?
or navw32.exe ?
in the Run command box and see if the program will list the options. It might be better to go to the Norton support site and see if someone knows.
Two AV scanners are bad enough but you sure don't want to run two real-time scanners on a PC. They can interfere with each other and cause data corruption and/or crashes. She really should make a choice or ONE. If it were me, I'd flush Norton and go with MSE anyway. It's faster, less obtrusive and it's free. It also has the advantage of having Microsoft engineers with the inside scoop on the team. It gets definition updates every day and software updates once or twice a year.