After upgrading to Windows 10, it is necessary to reinstall all drivers for the NUC (don't rely on Windows 10 upgrade to do so). This includes the BT driver...
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Thank you pearson for your input on this.
Here you can find the driver download page for your product masonjo: https://downloadcenter.intel.com/product/89190/Intel-NUC-Kit-NUC6i5SYH
Hope you can install them and let us know how it goes.