PC World - Norton Antivirus has been a strong performer in recent years, and this year is no exception. Norton Antivirus 2011 does a very good job at detecting and removing malware, and it has a smooth interface.
Steven Musil, CNET:
"The security software maker, which had previously blamed the theft on a third party, acknowledged that hackers had infiltrated its own networks. The hackers obtained 2006-era source code for Norton Antivirus Corporate Edition, Norton Internet Security, Norton SystemWorks (Norton Utilities and Norton GoBack), and PCAnywhere, the company said in a statement."
The Norwegian website Hardware.no recently tested 6 antivirus programs, and I present you with their conclusion below:
We have tested six antivirus programs, the free programs Microsoft Security Essentials (MSE), Avira, Avast and AVG. We also tested Norton and NOD32, which is not free.
www.skuggen.com/2011/03/top-6- antivirus-programs-for-windows/
Here's the article, different site same result ^