Answer:Privilege control
Explanation: Privilege control is the control over the computer /operating system by giving the authority for security related activities in it. This control helps the user for performing the task with the hint of knowledge of the results of the security such as installation of software etc.
Users that don't have privilege control are known as unprivileged .Other given options are incorrect because they don't deal with the restriction of control with the security .Thus the correct answer is privilege control.