Filesharing programs such as Limewire, Frostwire, or Bit Torrent, were found on your computer. While these types of things are popular on the Internet because the facilitate the free downloading of copyrighted music, videos, and software, they are also a large source of Viruses and other Malware. These free downloads can become very expensive when what you think is a free program or song ends up being a virus that damages your computer or steals private information like passwords or other confidential information. Illegal downloading of copyrighted works can also result in legal action against you if you are caught.