When the Media Reader disappears, does the Bluetooth Hub also disappear? This can be determined by going into device manager and opening the list of USB controllers. There should by a HUB called CAB-200 (this is the media reader HUB) and another one, possibly underneath it, listed as a Generic USB HUB. The generic hub should be the HUB for the Bluetooth device. This can be confirmed by right clicking on it, selecting Properties, and then the Power tab. The Bluetooth device will listed under attached devices.