I've just bought a Motorola H390 Bluetooth Headset. I can use it with my smartphone (Nokia 5800 XM) and also with Skype on my laptop.
Is it possible to use it as a headphone to listen to all sounds on my laptop?
For example: movies, Winamp etc?
The stock Windows Bluetooth stack does not support audio profiles as an audio target. Acquire and install the Bluetooth stack provided by the dongle manufacturer.
Finally I found how to do it by using software called Bluesoleil.
After adding my headset via Bluesoleil,I went to Control Panel > Devices & Printers > Set Bluetooth Headset as default for sound devices