1. Error Code 17: The 1.33 and 2.00.BETA2 versions have a problem that sometimes (or always) BT pairing trial has failed with Error Code 17. I have fixed the problem and updated to 1.33.b and 2.00.BETA2.b, respectively. Then if you are using an Intel BT adapter, please update to the new version regardless of whether the problem occurs or not. 2. Windows 7 PC (Error Code 15/11/12): If your PC is Windows 7 and you are using an Intel BT adapter, you have to install the Windows 8.1 driver instead of the Windows 7 driver. The Windows 7 driver is based on Broadcom WIDCOMM, and the Windows 8.1 driver is based on the Microsoft Bluetooth driver and it is fully backward compatible with Windows 7. The Intel BT adapter drivers are available from https://downloadcenter.intel.com/product/86068/Intel-Dual-Band-Wireless-AC-8260.