To help determine what may be causing the problem:
1. What is the make and model of your device?
In the search bar, type MSINFO32 and hit Enter.
Please share a screenshot of that window.
2. Which specific KB update did you install that caused the issue?
In the meantime, try uninstalling the audio driver and restarting your computer to see if this resolves the issue:
Press Windows + X and select Device Manager.
Click View > Show hidden devices.
Expand Sound, video and game controllers.
Look for your audio driver, then right-click it.
Select Uninstall device > Ok/Yes
Restart your computer and see if the issue is resolved.