Windows 10: my input and output devices are not available. How do i get them back?

I would like to do dictations,input and output devices are unavailable how do i restore them?

:)

 

no input or output audio devices found

Unfortunately, that did not work. There is something listed under the sound now in the device manager and that says it is functioning, but i still have no sound and it states there are no input and output devices.

 

No audio input or output devices found

After the last update of Windows 10, no audio devices are listed

Searching in the device manager: all audio devices say it works fine

The sound setting says: no output or input devices were found.

 

HFP devices no longer show as audio input or audio output devices (Win11)

All of my HFP Bluetooth devices are no longer available as audio input or output devices. A2DP devices still show as audio output devices.

I've tried:

• unpairing and repairing BT devices (Sony MDR-ZX770BN and a custom ESP32-based device)
  
• removing all BT devices (including hidden devices) from Device Manager, including the RFCOMM and SDP services and Intel wireless driver, etc. and reinstalling
  
• removing the Audio devices (Realtek) and reinstalling
  
• sfc /scannow (no problems found)
  
• checked registry Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Bluetooth\Audio\Hfp\AudioGateay and ..\HandsFree and both show registry value Enabled=1 (not that I've seen any diagnostic ever suggest checking these keys)
  
• pairing my headphones to a Win10 laptop, which works fine, and audio input/output devices allow me to select HFP (also A2DP)
  checking the headphones under "Control Panel\Hardware and Sound\Devices and Printers", I can confirm under "Bluetooth Services" the headphones show Audio Sink, and Hands-free Telephony, so SDP has discovered the HFP profile correctly
  
• my ESP32 device also has SPP (serial port) which works fine, and the headphones can use A2DP just fine, so Windows can use the other BT profiles on these devices
  
• running troubleshooter for Audio Input and Audio Output devices - the troubleshooter finds nothing, and doesn't even list the HFP device as an audio device
  

HFP was working OK before Christmas. At some point since then all HFP devices no longer show as audio input/recording sources or output sources.

My laptop is a Lenovo Thinkpad L15 gen 3, roughly 1 year old. Windows and drivers are all up-to-date.