"A new and effective free antivirus."
ClamAV is a new, totally free antivirus software, created originally for UNIX, but now has its corresponding version for Windows (which is the version offered here). ClamAV is an open code antivirus solution featuring an effective command line to scan for files, virus updates, and really fast system scan.
Remember that ClamAV is written under a GPL licence, which means you can modify its code as you like, as long as you respect the rules of the licence. The program (or better said, its database) is updated daily to assure you that you are protected against the latest viruses and other threats that exist, like trojans, viruses, malware & other malicious threats.
According to the authors, ClamAV includes a multi-threaded scanner daemon, command line utilities for on demand file scanning and automatic signature updates, supports multiple file formats, file and archive unpacking, and multiple signature languages. This ClamAV program is very easy to download, install and then use, through its friendly and intuitive user interface. You don't need any technical experience at all to get the most out of it.