What is the best approach to achieve the goals?

A corporate environment includes client computers running Windows 7 Enterprise. You find an
unknown service installed on a client computer. You suspect that the client computer has been
infected with malicious software. You need to recommend an approach for identifying and
terminating processes the service is running. What is the best approach to achieve the goals? (More
than one answer choice may achieve the goal. Select the BEST answer.)

A.
Run Windows Defender

B.
Run Windows Task Manager

C.
Run the Services Management console

D.
Run Action Center

Explanation:
http://technet.microsoft.com/en-us/library/dd996615(v=WS.10).aspx