Then restart your PC.
The team gathered around the conference table, surrounded by whiteboards, laptops, and scribbled notes. They began to dissect the error message, trying to understand what it meant. The handsfree telephony system used a complex set of parameters to establish and maintain calls. These parameters, such as call initiation, audio routing, and voice processing, were carefully calibrated to ensure a high-quality calling experience.
This error is rare on Windows 11, more common on Windows 10 after updates. Microsoft has acknowledged it’s a Bluetooth stack negotiation bug — so you’re not alone.
Locate the folder (there may be multiple versions like BluetoothUserService_XXXXX ). In the right pane, double-click on Start .
If you need audio immediately and cannot fix the registry immediately, you can disable the specific service causing the error. This will disable the microphone functionality on the headset but restore stereo audio.
net stop audiosrv net stop AudioEndpointBuilder net start AudioEndpointBuilder net start audiosrv
Sometimes the error stems from a conflict between the default Windows drivers and your system's audio hardware.
Expand and right-click your headset; select Uninstall device .
Repeat this for any other similarly named Bluetooth User Service folders.
The Parameter Is Incorrect Handsfree Telephony //free\\ -
Then restart your PC.
The team gathered around the conference table, surrounded by whiteboards, laptops, and scribbled notes. They began to dissect the error message, trying to understand what it meant. The handsfree telephony system used a complex set of parameters to establish and maintain calls. These parameters, such as call initiation, audio routing, and voice processing, were carefully calibrated to ensure a high-quality calling experience.
This error is rare on Windows 11, more common on Windows 10 after updates. Microsoft has acknowledged it’s a Bluetooth stack negotiation bug — so you’re not alone. the parameter is incorrect handsfree telephony
Locate the folder (there may be multiple versions like BluetoothUserService_XXXXX ). In the right pane, double-click on Start .
If you need audio immediately and cannot fix the registry immediately, you can disable the specific service causing the error. This will disable the microphone functionality on the headset but restore stereo audio. Then restart your PC
net stop audiosrv net stop AudioEndpointBuilder net start AudioEndpointBuilder net start audiosrv
Sometimes the error stems from a conflict between the default Windows drivers and your system's audio hardware. The handsfree telephony system used a complex set
Expand and right-click your headset; select Uninstall device .
Repeat this for any other similarly named Bluetooth User Service folders.
