EDR Bluetooth 2.0 adapter, my window shows a message

When I installed my EDR Bluetooth 2.0 adapter, my window shows a message as ` Bluetooth peripheral device-no driver found’. What is the meaning of this message? The next question is – when I operate the headset via the same Bluetooth adapter
i.e. EDR Bluetooth 2.0 adapter, it appears work but it does not give sound on the headset.
