Threat type is a status assigned to the object by Kaspersky Anti-Virus during scan.
The status is assigned according to the classification of malicious and potentially dangerous software contained in the Kaspersky Lab Virus Encyclopedia.
Potentially dangerous software is the software that does not perform any malicious functions itself but can be exploited by a malicious program due to its vulnerabilities or errors.
Threat types identified and disinfected by Kaspersky Anti-Virus 6.0 R2
This category includes, for example: remote administration tools, IRC clients, FTP servers, all kinds of utilities for stopping/hiding processes, keyloggers, password extraction tools, autodialers calling to paid websites, etc. Such software is not classified as viruses (not-a-virus), and can be split into types: Adware, Jokeware, Riskware, etc. (You can learn more about the potentially dangerous software in the Virus Encyclopedia).
Such software may be blocked in the result of scanning. Yet some of it is very popular, so there is a possibility of excluding it from scanning. To do so, create an exclusion for a threat name or mask according to the Virus Encyclopedia classification.