Windows 10: How to fix or digitally sign BthA2dp.sys

My Surface headphones are stuck in hands-free and the audio is pretty bad compared to normal stereo headphone use.


I think it's related to BthA2dp.sys not working.


I've done all the typical attempts to fix. remove the cortana app, remove, uninstall drivers, reinstall and on and on. This hands free mode sucks for music. Several reset attempts.


I've even tried a different Bluetooth adapter, same result. And, even got a replacement setof headphones - from the suggestion of MS support - same thing.


Every other BT device works fine.


After more digging I noticed the driver BthA2dp.sys isn't working. Windows isn't recognizing it. See attached images. I can't even delete the file to try to reinstall it. This driver is working on other devices that the headphones pair with.












Not sure how much this matters, but the Surface Headphones Stereo don't show up under the Sound drop-down, just that error'd driver in their place.


I have no idea what change could have caused this. They worked one day and not the next.


So, I'm stuck. Any help would be much appreciated.

:)

 

Fix You've been signed in with a temporary profile in Windows 10  


I've followed your steps and there's no profile list. Am trying to fix for my sister. Brink please can you help

 

Getting "a digitally signed driver is required"

Hi Thomas,

This error can occur if there is a driver attempting to be installed on the system that was not signed by Microsoft digitally. Driver digital signatures help verify the integrity of the driver packages. To avoid this error, you need to disable the driver
signature enforcement. Follow the steps below:

• Press and hold the Shift key then click Restart button.
• Choose Troubleshoot, then select Advanced options.
  
• Select Startup Settings and click Restart.
  
• Once the computer restarts, you'll see a list of options. Press F7 to select
  Disable driver signature.
• Computer will now restart. Once done, check if the same error will occur.

Let us know the outcome so we can provide further assistance.

 

Unlocked Realtek HD Audio Drivers Windows 7 & 8 (With Dolby Digital Live and DTS Interactive)

Wait, but have you done the whole step-by-step guide described in the OP? DDL/DTS isn't supported natively by Windows 8/8.1 either, unless if you do the steps listed there.