To select the audio output device on a computer running the Windows® XP operating system, follow these steps:
Click the "Start" button on the lower-left corner of the screen
Click the Windows® "Control Panel"
Click the "Sounds and Audio Devices" icon
Note: You may need to switch to "Classic View" in the top left-hand corner to see the System Menu above.
The Sounds and Audio Devices Properties window appears. In the "Audio" tab, under the "Sound Playback" selection, select the Bluetooth® device from the drop-down menu
If you made any changes, click "Apply" and then click "OK" to close the window