The Kinect Status Notifier, will pops up a notification in system tray whenever this changes in sensor status. This can be very useful for Kinect for windows SDK based application.
To understand the flow of the Kinect status and the scenarios on which it can occur in a simpler way, refer the diagram below. Once the device is plugged in and power is turned off it will goes to “Not Powered” state, similarly for unplugging the device from USB port will returns the “Disconnected” status. If you plugged it in back or turn the power on, first it will in “Initializing” state before turns into “Connected” state.