I'm with blue. Norton is a resource hog and I don't like it. I don't say anything to clients who like it; for those who have questions or concerns, I go with AVG or Avast free versions.
I use a paid program from Trend Micro. About $50 a year, and MUCH less invasive! (There is a paid AVG as well).
Just mentioning that in case you think paying for one makes it better.
Avast Free (there are links to paid ones in the left margin):http://www.avast.com/eng/avast_4_home.html
Trend Micro: http://us.trendmicro.com/us/home/
AVG paid: http://www.avg.com/us-en/home-and-of...?ctype=ps3925e
AVG free: http://free.avg.com/ww-en/homepage
Comparison chart of features in free vs paid AVG: http://free.avg.com/ww-en/download-a...s-free-edition
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