Unknown HW in Other devices and working properly - Microsoft Q&A
A user usually encounters this string when something goes wrong with a Bluetooth connection.
Re-pair your device. Windows will attempt a clean setup of the Bluetooth profiles. Step 4: Manually Assign a Generic Bluetooth Service
If you can provide more background (where this came from, what system uses bthenum , or any associated logs/errors), I’d be glad to help you structure a report or analyze further.
In the context of Bluetooth, these UUIDs identify specific services offered by a device—such as audio streaming, hands-free profiles, or custom manufacturer-defined functions. This specific UUID is categorized as , frequently appearing in logs for high-end Bluetooth headsets like the Bose QuietComfort 35 II . Common Issues and Symptoms bthenum 931c7e8a-540f-4686-b798-e8df0a2ad9f7
[ERROR] bthenum: Failed to process request with trace-id=931c7e8a-540f-4686-b798-e8df0a2ad9f7
This looks like a unique identifier (possibly a UUID/GUID) prefixed by the word , which isn’t a standard English word or a known common term. It could be:
When you see BTHENUM\931c7e8a-540f-4686-b798-e8df0a2ad9f7_LOCALMFG&08e7 under "Other Devices", Windows has established a basic connection with a peripheral (like a smartphone, headset, or motherboard-integrated Bluetooth chip), but it lacks the proprietary driver necessary to leverage that specific profile. Why is it showing as an "Unknown Device"?
: The UUID 931c7e8a-540f-4686-b798-e8df0a2ad9f7 has been observed on various hardware configurations, including Sony audio peripherals (linked to vendor ID 0002054C ) and Microsoft Surface or Asus Zenbook systems. Unknown HW in Other devices and working properly
under "Other devices" or "Bluetooth" if there is a driver conflict or if the system is attempting to identify specific features like the Google Assistant integration or firmware update services. Microsoft Learn Why you are seeing this: Missing Drivers
Technical Importance of 931c7e8a-540f-4686-b798-e8df0a2ad9f7
: This stands for Bluetooth Enumerator . It is a built-in Windows service that scans your system's Bluetooth radio, detects when a Bluetooth device is nearby or paired, and assigns unique identifiers to the features (profiles) that the device supports.
But what does the prefix bthenum signify? In many engineering cultures, custom prefixes like bthenum (possibly short for “backend then enum” or a project code) are added to UUIDs to denote the environment, service owner, or type of tracked entity — for example, a background task handle, an enumeration lookup failure, or a transaction token. Step 4: Manually Assign a Generic Bluetooth Service
: Documentation suggest it often acts as an ARfcomm interface or a node for High Definition Audio Controllers that bridge Bluetooth data to the system's sound or communication bus. Why it Appears as "Unknown"
When you connect a wireless peripheral to your PC, the Windows Driver Architecture uses an "enumerator" to detect the hardware and translate its signals into something the operating system can categorize.
When Windows isolates this GUID inside the "Other Devices" category, it usually stems from three specific configuration issues: