Antivirus System Pro is available for downloading and installing at the free online data storages and is disguised as a codec or another software, instead of which a user gets the infection of Antivirus System Pro. The single aim of Antivirus System Pro installation is luring users into buying the full version of this rogue [...]

Source: http://hands-oncorp.com/2009/06/22/antivirus-system-pro-removal-instructions/