If you get the error, the typical cause is an outdated Bluetooth radio hardware driver. " The Supplied User Buffer is Invalid" error dialog box will appear, once per each device.įixing the Supplied User Buffer is Invalid error: Bluetooth Radio (host) Driver Update The services will be enabled and the device will be recognized as a sound device. ![]() ![]() In the device properties, the Bluetooth services related to audio are likely to be unchecked: Navigate in Explorer to Control Panel\Hardware and Sound\Devices and Printers, right-click on the headset device, and select "Properties": The device doesn't appear as an audio device in spite of being connected, because its audio-related services are not enabled. Enable the needed Bluetooth Services on the Device ![]() Make sure your Intel Wireless Bluetooth driver is at least of version 20.90, and enable all Bluetooth services for your headset device.
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