Detecting machine utilization activity may be provided. Client machine activity within a computer network may be monitored to determine if the client machine is available for use, or if the computer is already engaged in one or more activities. During a predetermined receive period, machine activity information for a given client machine. The machine activity information for the client machine is compared to previously stored machine activity information to determine if an activity state for the client machine has changed. If the activity state of the client machine has changed, the activity state for the machine is updated. Machine activity information for all computers in the computer network may be used to track and optimize resources with the computer network.