Gabriele,

Cyren Zero-hour is a service that provides protection in the earliest moments of malware outbreaks and continued protection as each new variant emerges. This service is intended to be used as a complement to conventional antivirus technology as an additional protection against zero-hour virus outbreaks. Because Cyren looks for new variants of malware, we unfortunately can't guarantee that existing viruses should be caught by that service.

Cyren Zero-hour should always be used in conjunction with another antivirus solution such as ClamAV.