Windows 7 came with no A2DP support and MS asked bluetooth hardware manufacturer to add this feature in driver upgrade. All bluetooth hardware on laptop where most of the time we need A2DP are made by Broadcomm (widcomm software), Toshiba or CSR. The last 2 manufacturer seem to have A2DP in Vista which should work in W7 but for Broadcomm nothing around.
I followed the steps and worked great for my Motorola S305 Bluetooth Stereo Headset
