If you're running Win7, it's just temporarily using it to run background tasks. If you opened enough apps it'd redirect usage to that.
Get rid of norton,well known to be very cpu taxing.
You will prob have to search for Norton cleaner on google also.
For a good free alternative you want to be using one of these :
Avast
Microsoft Security Essentials
Avira
.I would be seeing as I am only a teen (14) my dad insists on me having norton on the computer.

Ok tell your Dad to read reports/ reviews/forums post on Norton,you might convince him then![]()