I bought this adapter, because I wanted to run my Bluetooth headset "Plantronics Voyager Pro HD" in order. I have a Windows 7 (64bit), the appropriate drivers (Bluetooth Stack by Toshiba) are on CD in. Based on the advice in the other reviews but I have loaded the latest drivers from the Hama page. The installation went smoothly at first. But after you restart the computer, I realized that every time I turned on the headset, the process TosBtHSP.exe crashed. Without this process the headset but could not operate. Restarting the computer did not bring anything. Then I spent hours, all settings durchzuprobieren (unsuccessfully). Used at the end then the system restore, and then I have the Windows Bluetooth stack (ie simply have Windows search the driver and do not use the Hama / Toshiba driver). Since then everything works fine. Finally, I have to say: Nice that there is a frustration-free packaging. But a frustration-free driver installation would have preferred.