Fortunately, if you catch this error, thisMiniToolpost is for you.
It is terrible if you meet the audio not working on laptop error, so how to fix it?
Read this post carefully to find multiple methods to get rid of it.
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Step 2: In the right column, choose theAdditional troubleshootersoption to continue.
Step 3: In the following window, select thePlaying Audiooption, and clickRun the troubleshooter.
Its a vital component thatenables sound for any program running on the Windows operating system.

This Service ensures that you could play audio without any interruptions.
If the service is disabled, you may encounter various sound issues, such as audio error 0xc00d4e86.
Then, typeServicesand snag the appropriate result.

Step 2: In the Services window, scroll down to find theWindows Audiooption in the right panel.
Step 3: Next, right-click it and select thePropertiesoption to continue.
Step 4: In the pop-up window, click theStartup typedropdown menu and select theAutomaticoption.

Step 5: Press theStartbutton, selectApply, and pressOKto save the change.
Step 1: Right-hit theSoundicon in the taskbar, choose theSoundsoption, and navigate to thePlaybacktab.
Step 2: Right-press your default playback unit and choose thePropertiesoption.

Step 3: Select theAdvancedtab on the top toolkit and click theRestore Defaultsbutton.
Step 4: PressApplyand selectOKto save the change.
After finishing the above steps, check whether the error is resolved.
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Sometimes, audio enhancements may interfere with sound quality and cause errors, such as audio error 0xc00d4e86.
Disabling these enhancements can resolve issues by preventing software conflicts.
Step 1: Right-click theSoundicon in the taskbar and select theSoundsoption.

Step 2: Navigate to thePlaybacktab.
Step 3: Right-hit the default playback rig and chooseProperties.
Step 4: Next, navigate to theEnhancementstab.

Step 5: Tick theDisable all enhancementscheckbox.
Step 6: PressApplyand hitOKto apply the change.
Here is how to fix 0xc00d4e86:
Step 1: Press theWin+Xkey combination to launch Quick Access Manu.

Step 2: Select theDevice Manageroption from the list.
Step 3: Double-click theSounds, video and game controllerssection.
Step 4: Right-click your audio unit and chooseUpdate driver.
Step 5: Next, chooseSearch automatically for drivers.
After completing the above steps, reboot your box and check the audio error 0xc00d4e86 is resolved.
Chances are, you could solve the audio error 0xc00d4e86 by yourself.
Hope the detailed solutions are helpful for you!