How to fix sound not working in Windows?

If you are receiving sound not working error in your Windows PC, then first check Settings -System -Sound and make sure the correct output device is selected and the volume isn’t muted. Then run Settings -System -Troubleshoot -Other troubleshooters -Audio -Run. If that doesn’t fix it, update or reinstall the audio driver through Device Manager -Sound, video and game controllers. Also check that your speakers/headphones are properly connected and test another output device to rule out a hardware problem.
 
It has happened to me when Windows chose another speaker/headphones. I would be right-clicking on the sound icon, selecting Sound settings and selecting the proper output device. I would attempt to restart the Windows Audio service and verify for any new drivers in Device Manager.
 
My initial step would be to see if it is a problem with all apps or just one. I would then check the volume mixer, output device and audio driver. A fast restart may be the remedy to small issues with Windows, but if that doesn't help I'd go to the Windows Update troubleshooter and look for Windows Update issues.
 
A few things I’d check:
  • Go to Settings → System → Sound and select the correct output device.
  • Check the volume and mute settings.
  • Disconnect and reconnect your headphones/speakers.
  • Restart Windows.
  • Run the built-in audio troubleshooter if it still doesn’t work.
 
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