Troubleshooting often involves forcing the Bluetooth stack to reconnect via the Hands-Free Profile. In device manager, locating the device associated with the 931c7e8a-540f-4686-b798-e8df0a2ad9f7 GUID and ensuring its driver is active is the first step to restoring voice functionality.
After the bthenum incident, the team wrote a postmortem with the following recommendations: bthenum 931c7e8a-540f-4686-b798-e8df0a2ad9f7
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\931c7e8a-540f-4686-b798-e8df0a2ad9f7 bthenum 931c7e8a-540f-4686-b798-e8df0a2ad9f7