Defcnt.exe is the core part of rogue antispyware program called Defense Center. Defcnt.exe infiltrate computers through the use of trojan (autmgr32.exe and wscsvc32.exe are components of the trojan). When the trojan is downloaded and started, it will download defcnt.exe and other components of Defense Center and save it to %ProgramFiles%\Defense Center folder (where %ProgramFiles% is