If you are looking for a reliable, strong enough, low resource consumption but free antivirus solution, I will quickly recommend Avast and Avira, the free versions of course. Both long-time fame antivirus suites have become freebies and too popular among regular end-users. In case you can afford to purchase a premium antivirus suite, Norton, Bitdefender and Kaspersky are my three top choice. In addition to that, you can upgrade the two best free antivirus suites I mentioned above into the paid versions.
With security vendors, 2011 is probably the most whistling year in last few years since they all released the newer, better performance and more features version. Like many others security company, the Germany based giant GmbH & Co. KG has just rolled Avira 2012 version out which including Avira Free Antivirus 2012, Avira Antivirus Premium 2012 and Avira Internet Security 2012 for home users. In this occasion, you can get free 6 months Avira Internet Security 2012. Here are some simple steps.