PC Magazine reviewed and ranked cleaning tools, free AV projects, and premium suites in the attached article:

AntiVirus Products for 2012 – Review by PC Magazine

QUOTE: To evaluate antivirus utilities I rely on hands-on, real-world testing. The malware removal test involves installing each product on a dozen malware-infested virtual machines and challenging it to clean them up. This article explains how I get from those tests to the figures in the chart below: How We Test Malware Removal   I also refer to reports from major independent antivirus testing labs. The labs have vastly more resources than I do, so they can perform large-scale tests that would take more time than I have available. The chart below specifically lists results for the companies whose 2012 products are rounded up here.