Pros: Norton's good with updates, stability, & upgrading the software suite to suit the OS throughout the course of the license.
Cons: Norton has had an ambitious past with regards to automatic renewals to your account. Buy it here and then before the last month is near, log into their site to make sure auto renewal is off. They really stick it to you without your explicit consent to do so. Just uncheck the auto renewal & you'll be fine.
Pros: Very low system resources usage in idle state. Moderate usage during active scan, but scan is fast! Includes such cool tools as Vault - free cloud password organizer, BackUp, TuneUp, and Identitu Protection
Pros: So far I have used this for about 5 years and cross my fingers I have had no issues. I have used other software and they have let stuff in and then wanted to charge me to remove it. This is easy to install and has easy interface