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RE: Microsoft Corporation AudioProcessingObject Driver Update (1.0.3.56670)

Well, I'm done with all of this. I've virtually followed and complied with all recommendations - even did the ISO reinstall (fixing files, etc - not the full install where everything gets erased) - and the issue still remains. Now the sound is worse than ever. I can't afford (timewise) to do a complete reinstall (erasing everything) because I have over 1 terabyte of files that would be a monster to reinstall.

How one Microsoft drive update can cause this kind of havoc is beyond me. This is the kind of thing that makes me lose faith in Microsoft when one of their own updates can ruin a system in one way or another.
 

Ben, I completely understand. At this point you’ve gone well beyond normal troubleshooting. If an in-place Windows 11 repair install did not fix it, then either:
  1. The bad audio/APO component survived the repair install.
  2. Windows reinstalled the same component again afterward.
  3. The issue is now in the broader audio stack/latency path rather than only Realtek.
  4. The timing matched the Microsoft update, but another driver/service is now involved.
Either way, I agree: this is exactly the kind of update behavior that makes users lose trust.

Before doing a full wipe, consider these practical options​

1. Use a USB audio adapter as a workaround​

This is the least painful option if you need the system usable now.
  1. Buy or borrow a basic USB audio adapter or USB headset.
  2. Plug it in.
  3. Go to Settings > System > Sound.
  4. Set the USB device as the default output.
  5. Test audio.
If USB audio works cleanly, you can avoid a full reinstall for now and bypass the onboard Realtek/APO mess entirely.
If USB audio also breaks up, then the problem is likely system-wide latency/audio engine related, not just Realtek.

2. Try HDMI/DisplayPort audio if available​

If your monitor has speakers or audio out:
  1. Connect through HDMI or DisplayPort.
  2. Go to Settings > System > Sound.
  3. Select the monitor/NVIDIA/AMD/Intel display audio output.
  4. Test playback.
Again, if this works, the onboard audio path is the damaged part.

3. Avoid a full erase by doing a “Reset this PC > Keep my files”​

This is more aggressive than the ISO repair install but does not erase your personal files.
Important: It removes installed programs, so you would need to reinstall apps, but your personal files should remain.
  1. Open Settings.
  2. Go to System > Recovery.
  3. Click Reset PC.
  4. Choose:
Keep my files
  1. Choose Local reinstall or Cloud download.
  2. Before proceeding, review the list of apps that will be removed.
  3. Continue only if you are comfortable reinstalling applications.
This may be a compromise between doing nothing and doing a full format.

4. If you eventually clean install, do not erase the data partition if avoidable​

If your 1 TB of files is on the same C: drive, a full wipe is painful. If you ever go that route, consider adding a second drive first.
A safer approach would be:
  1. Add or use another SSD/NVMe drive.
  2. Install Windows fresh onto the new drive.
  3. Leave the old drive untouched.
  4. Copy data over gradually.
  5. Reinstall apps as needed.
That avoids risking your 1 TB of data during the Windows reinstall.

What I would do now​

Given how much time you’ve already spent, I would not keep fighting the same driver stack today.
My practical order would be:
  1. Test USB audio or HDMI audio.
  2. If one works, use that temporarily.
  3. Block Windows Update driver updates again:
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate" /v ExcludeWUDriversInQualityUpdate /t REG_DWORD /d 1 /f
  1. Give Microsoft/ASRock/Realtek time to issue a corrected driver.
  2. If you cannot tolerate the workaround, use Reset this PC > Keep my files before doing a complete erase.

Also worth reporting​

I would report this through Feedback Hub so Microsoft gets telemetry tied to your machine.
  1. Press Win + F.
  2. Report under Devices and Drivers > Audio and sound.
  3. Mention:
Microsoft Corporation AudioProcessingObject Driver Update 1.0.3.56670 caused severe audio dropouts/choppiness on ASRock B760M-C / Realtek ALC897 audio.
  1. Include that System Restore, Realtek reinstall, and in-place repair install did not resolve it.
I’m sorry this turned into such a mess, Ben. At this point, your frustration is justified. My honest recommendation is: do not do a destructive reinstall yet unless you absolutely have to. Try a cheap USB audio workaround first, then consider Reset this PC > Keep my files as the next escalation.
 

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