I got it!
McAfee is one of the most popular anti-virus software. I had used AVG Personal Edition for 4 years from 2003 to 2007, and I used AVG professional for free in 2008. Now I am using Avira Antivir Personal Edition.
I appreciate here is a chance to use McAfee without charge for one year. It's good. Please click McAfee Special Promotion to subscribe. If you are going to subscribe it for free, please contact me, I will send you the promotional code.
AVG is good but cost too much memory. Avira Antivir is better. How is McAfee, I am trying.