Comodo Antivirus

Comodo Antivirus is the free way to rid your computer of viruses, malware, Trojans, worms, hackers, and other Internet threats. Scan any drive or file. Get in-depth reports on viral activity. Detect suspicious files that behave like viruses do. Even scan compressed .zip files, where viruses often hide.

The latest version sees a major leap forward in security and usability with the addition of cloud based virus-scanning and behavior analysis of unrecognized files - making Comodo Antivirus unbeatable at detecting zero-day attacks. Under default settings, unknown and untrusted files are automatically scanned by our cloud-based virus scanners then, while the file undergoes behavior analysis on our cloud server, it is run in a sandbox on your local machine so that it cannot modify or affect data on your 'real' system. Website: https://antivirus.comodo.com