I have a mystery on my hands. I received a Bluetooth speaker as a gift. The BT-4.0 adapter plugged into my computer (USB-2.0 port) detects it (as a "Bluetooth headset"), but when I try to select it as my output device (from the "Sound" Control Panel), Windows reports it as "Disconnected". If I open "Devices and Printers" and right-click the "Bluetooth headset" icon, I get an alert that the device "Failed to initialize". I've tried rebooting, tried a different BT adapter, updated my BT drivers off the makers' website, Device Manager shows everything is connected & working (including "Bluetooth Audio"). 64bit Win7 Home. Inateck BT-4.0 usb adapter. Speaker is a "MicroBoom" BT v2.1: Any ideas? PS: Eliminated the obvious. Speaker is fully charged and works just fine with my phone.