Good ratings from independent antivirus test labs. Streamlined user interface. Many options for malware cleanup. Website reputation check. Do Not Track. Checks for unpatched applications. Can install and scan in Safe Mode.
CONSMiddling score in malware-blocking test. Heuristic malware detection blocked some valid programs. Difficult to exclude wrongly-blocked programs. Phishing protection weak.
avast! Free Antivirus 2014 boasts a newly streamlined user interface and some interesting new features. With 200 million users it's definitely a contender in the free antivirus space.