This is an automatic translation of the original german program description, made by Google's translation service:
Comodo Internet Security is a free security solution that protects your computer while surfing the Internet. Comodo Internet Security is composed of the components of firewall, antivirus and defense. The "Comodo Firewall" analyzes traffic and blocks attacks from the Internet onto their computers. Prevented, however, that malicious program from your computer to send data from the Internet.
"Comodo Antivirus" is a complete anti-virus software with free signature updates. All file operations will be monitored by the real-time test. Malicious files are detected directly. It is possible to conduct regular audits of the entire hard disk or selected directories. Malicious programs can be disinfected, deleted, or quarantined.
The component "Defense" provides further protection by system files, the Windows registry or selected programs and files are monitored for change. Changes to those files can do so not gone unnoticedby malware, but only if they agree explicitly.