I completely agree with Mr_Arkadin - What I don't really see is that even though you have a licence for Norton that you are going to carry on using it. That's a bit like buying a dozen oysters and finding out they are all bad but you decide to eat them because you have paid for them.

I would strongly suggest that you consider an alternative. I work with a lot of people that have specific needs of their systems and use equipment that doesn't always hit the hardware in a conventional way. Frequently Norton prevents their systems from working and McAfee just plain slows their systems down.

AVG and Avast! are both free (so you wont spend any additional money) and will probably serve you better IMHO.