After a Windows Update, my Sony WH-1000XM3 headphones didn’t seem to work correctly. I could only select Hands-Free AG Audio as audio device. The sound was horrible, noisy and mono.
Problem and symptoms
Before the update I used to have 2 audio-devices for my headset:
- a stereo device for high quality Spotify, and a
- handsfree headset device for Skype calls.
Afterwards, I only had one audio device: WH-1000XM3 Hands-Free AG Audio . Unfortunately, this device outputs low quality sound. Only useful for phone calls.
Solution for low sound quality on headphones
To fix the sound issues, I had to restore the working drivers in Windows. It sounds more complicated than it is. Here’s how:
- First, click Start -> type sigverif -> click on Sigverif Run Command
- In the File Signature Verification window, click Start.
The application scans the installed drivers for valid signatures. This may take a minute or three.
- Once completed, in the Signature Verification Results note the files that are not digitally signed. You should see your headphone drivers. The filenames may be cryptical like BtaMPM.sys and BthHfAud.sys (in case of Sony WH-1000XM3).
- Next, open a command prompt as administrator and type:
DISM.exe /Online /Cleanup-image /Restorehealth
This may take several minutes.
- Next, in the same command prompt type:
Wait until the verification is 100% completed.
Your headphones should now have 2 audio outputs on your computer: Stereo and Handsfree
Run Sigverif again to check your drivers. It should now return no unsigned drivers.