Norton is the
god emperor of geeks the man who made his money fixing windows from the get go I will here no ill spoken of him.
I would go to Download.com and install
Zone alarm and
AVG. Zone alarm will produce lots of annoying squirrels for am bit whilst it learns what activity's you want to do automatically but stick with it as it will keep your pc out of trouble.
Avast is also a good choice but I prefer AVG
Ginger