Microsoft Confirms Update KB5015878 Causes Audio Issues in Windows 10 » Community

Microsoft Confirms Update KB5015878 Causes Audio Issues in Windows 10

Microsoft has acknowledged that the cumulative update is coded KB5015878released at the end of July, caused various audio issues on devices running Windows 10. To stop the problem from spreading, the company took advantage of the technology Known Issue Rollback (KIR)which allows you to remotely disable problematic non-security fixes.

From the Windows Health Dashboard page It is noted that on different devices the error manifests itself in different ways. Some users experience complete loss of sound after installing the update, while others experience sound only on certain ports, devices, or applications.

It’s important to note that rolling back changes using the Known Issue Rollback (KIR) was only intended to ensure that the issue does not occur on other devices after the KB5015878 update is installed. If you have already encountered this problem, then you will have to use the following instructions.

  • If you haven’t installed the update yet:
    • Update your audio device drivers (also referred to as “sound drivers” or “sound card drivers”) by downloading them from Windows Update or from the device manufacturer’s website. This may prevent the problem.
    • If you are using applications such as Open Broadcaster Software (OBS), it is recommended that you back up all application settings before installing an update.
  • If the sound is missing in certain applications:
    • Make sure the correct audio devices are selected in these apps. After installing KB5015878, audio destinations may be reinitialized, causing some applications to reset their audio settings to default.
    • If the settings in the application are correct, the applications may be caching the Windows Multimedia Device (MMDevice) ID. MMDevice ID caching is not recommended and may require you to reinstall the application or contact the application developer’s helpdesk to resolve an issue when reinitializing audio endpoints with new MMDevice IDs.
  • If the sound is lost in all applications:
    • The Troubleshooter can solve the problem. To do this, open Settings, go to Update & Security -> Troubleshoot, and select Play Sound.
    • If the problem with the sound is not resolved, then use the instructions from the article “Turn off sound enhancement“. The article lists the microphone as an example, but you will need to follow these steps for all audio devices affected by the issue.

The sound issue only affects Windows 10 versions 20H2, 21H1, and 21H2. Windows 11 users don’t seem to have much to worry about.


I am Sanjit Gupta. I have completed my BMS then MMS both in marketing. I even did a diploma in computer software and Digital Marketing.

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