Which is the Best Antivirus Software for Pc and Mobile?

Hi, I am using Avast anti virus in my PC and Laptop. I am using the same from last 5-6 years, from the day I started using my PC. For me it is the best one I can find out. Also Kaspersky is good, because it is having a cleaning facility. It will clean the infected file. I am using the Avast Home edition, which is free with a registration with your email address. They will send you a key with 14 months validity. After that you can renew again using the same process. Also it wont take much of your RAM as well as CPU. So no performance degradation. Comments expected...... Regards, Reyas... Happy Mylotting.....