Had to format HHD and install windows 8.1 Pro with wmc. Since then the Bluetooth does not send or receive any signal. I used "Bennett" to search for blue-tooth signals on my other two puters and find all my blue tooth items I have but not the inspiron 11. Bennett does show the bluetooth adapter when running Bennett on the machine. According to device manager and all other test the bluetooth is working. I've even removed the adapter and drivers through device manage and reinstalled to no avail. Bennett shows only networking as a service on the bluetooth adapter on the inspiron 11.