When an application requests microphone access (e.g., Zoom, Discord, Teams, Cortana), Windows automatically switches the active profile from A2DP to HFP. This causes:
Select (or "Open Sound settings" and then "Sound Control Panel" on newer builds). windows 10 disable hands free telephony
When a Bluetooth headset or earbuds are connected to Windows 10, the operating system installs two separate audio profiles: When an application requests microphone access (e
Once connected, Windows 10 often automatically installs the Hands-Free telephony driver. To ensure it stays disabled: windows 10 disable hands free telephony