It makes use of a 'set of behavior analyzers' to carry out the search. Host Intrusion Prevention System (HIPS) – ability to comprehensively monitor your PC(s) and prevent malicious attacks from entering it.Containment – technology which backs default deny approach by 'containing' or 'restraining' files and running them in a separate environment, until they prove themselves to be harmless, without affecting your PC(s) security.Default Deny Approach – unique approach adopted by Comodo which prevents all files by default from entering the system until they prove themselves to be harmless.Choosing this software helps successfully protect your PC(s) against viruses, trojan horses, worms, spyware, backdoors, rootkits, adware and other malware infections, including the most dangerous zero-day threats. Comodo Free Antivirus comes equipped with impressive security features making it the best free antivirus software in the IT security industry.