Haven't got the foggiest.
Why don't you kill Norton and use the "better": http://soho.sygate.com/products/shield_ov.htm
'Tis free.
That one is subscription-based and I have never used it.
For spy-ware detection, I would recommend using Adaware: http://www.lavasoft.de/software/adaware/
Free as all good things are 😉