A computer program directs a network server computer to maintain a program control list and to allow a user to update the program control list. The program directs a client computer to request the list of prohibited programs, to monitor programs running on the client computer, and to terminate any prohibited programs by invoking an application program interface (API) method. The client computer may use one or more of three API methods, including the SendMessage, CreateRemoteThread, and TerminateProcess Win32 API methods.
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