Norton and McAfee are the last software I would recommend for protection.
The two of them are the only virus software I have been paid to remove. (creepy)
I am fond of AVG Free, Malwarebytes, SuperAntiSpyware, CCleaner, and Defraggler.
I would suggest http://bleepingcomputer.com as a source of wisdom.
I would suggest viewing the software available for download at http://filehippo.com (all of the above are listed)
You will find valid arguments about Avast, BitDefender, and others - seldom is Norton or McAfee advocated.
A good overview of software can be found at (they only list paid versions, I suspect an affiliate relationship)
And a site that aggregates reviews and opinions from many sites.
sorry, you pushed one of my buttons ...
Glad I did...
Here's a few buttons from a Filemaker Go 12 sceen. Push all you want...