BlueTooth Tray Icon – BTSTACKSERVER.EXE
Btstackserver.exe is the Bluetooth Stack COM Server from Broadcomm (formerly Widcomm Inc). If you purchased a Bluetooth device, chances are Widcomm’s Bluetooth for Windows software came with it and installed with the drivers for it.
More information can be found at http://www.broadcom.com/products/Bluetooth/Bluetooth-RF-Silicon-and-Software-Solutions#s36.
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Broadcom