
If you're paying more than $0 for your home anti-virus software, you're probably paying too much. Avira, a German security software company, offers its AntiVir Personal antivirus product free-of-charge to home users.
Detection Rates
This is the most important property of an antivirus. According to recent tests conducted by AV-Comparatives.org, Avira scored higher than all of the major antivirus vendors including: AVG, Avast, ESET, McAfee, Symantec (Norton), and Trend Micro.
Resource Usage
In our personal experience, Avira is also one of the lightest antivirus products in terms of CPU and memory usage. Many antivirus products can bog down a system and make it virtually unusable. Older systems are especially vulnerable.
Avira Antivir Personal can be downloaded at http://www.free-av.com. Avira AntiVir Personal is for personal use only. Business users should consider purchasing Avira AntiVir Professional.
Sources:
http://www.av-comparatives.org
http://www.free-av.com
http://www.avira.com