unsecapp.exe is a process found on Microsoft Windows server and workstation suites which offers support towards compatibility issues.
Please see the website below for more information: http://msdn.Microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/iwbemunsecuredapartment_createsinkstub.asp
This program is important for the stable and secure running of your computer and should not be terminated.