avast! 4 Home - An anti virus program sold by ALWIL Software based in Prague, Czech Republic, first released in 1988. avast! is known by many people all over the world and it is available in 20 different languages.

AntiVir PersonalEdition Classic - This application is for personal usage only. Like most antiviruses, it both scans disk for viruses and runs as a background process, checking each opened and closed file.

AVG Anti-Virus - A range of anti virus programs for the Windows platform and for Linux. AVG is produced by Grisoft, a privately held Czech company.