Avast Free Antivirus

"Malwarebytes Anti-Malware combines powerful new technologies designed to seek out, destroy, and prevent malware infections. Malwarebytes Anti-Malware is an easy-to-use anti-malware application available in both a Free and PRO version. The Free version is well-known for its detection and removal capabilities, and the PRO version uses advanced protection technologies to proactively stop malware infections. Additionally, Malwarebytes offers a host of extra utilities as well as an approachable forum community to help you combat any piece of malware that exists in the wild."