One of the most irksome bugs you can run into after upgrading Windows 10 is the sudden loss of sound. It gets even scarier when you see that you (seemingly) have everything in place for sound to be produced. When or if this happens it is advisable to establish some things before rushing around poking into innocent programs and unrelated aspects of the computer system. On most desktop tower cases, you’re provided with multiple inputs for sound, make sure you’re only using one. Check the back, front and top of the desktop. Once done, proceed to the steps below.
Doing the initial check
Carry out the normal sound check.
Disconnect any peripheral sound devices such as microphones and headsets. Even external speakers should be unplugged unless the computer does not have internal speakers.
Check the system volume (even set it to maximum to be sure).
Hold the Windows Key and Press X. Choose Control Panel, In the control panel type “sound” in the search box and click on the Sound. Next, click on Manage sound devices. On the window that pops up, click on the playback tab and see what’s listed in there.
Usually the PC speakers will appear (something like “High Quality Audio Device”; which is set to default). If the working device shown on this window is not set to default, change and make it the default sound device.
At the far right you will see some bars placed on top of each other. This is where evidence of sound will be shown. If you play an audio file, you will see these bars turn to green (alternating motion). This is evidence of the default sound device being in good order; even if you cannot hear anything.
Observe anything unusual in this window because it could be the key to the solution in the subsequent steps. For example, an inactive/grey icon on the default sound device is a sign of faulty or non-existent sound drivers.
Try playing audio files with different file extensions e.g. wma, mp3, etc.
Now it is time to get into the thick of things.
Troubleshoot via Device Manager
Hold the Windows Key and Press X. Choose Device Manager
Locate “Sound, video, and game controllers” and click on it.
Select the sound card installed on your computer. Double click on it.
On the resulting window, go to the Driver tab and click on “Update Driver”. If updates are found Windows will proceed automatically. If none are found, search in the computer manufacturer’s website for the latest compatible sound driver. Follow their steps on how to download and install the drivers.
If you cannot update or install latest drivers, you can first uninstall the resident audio driver. Just right-click on the audio driver and choose uninstall.
Restart your PC and let Windows complete the driver installation automatically.
If the problem was emanating from a driver issue, it should be eliminated by now. Otherwise the sound problem right after a Windows 10 upgrade can be caused by a myriad of other factors. Do not be surprised if you solve the issue without knowing exactly what was wrong in the first place. If all else fails, you should now consider doing a system restore. Get your PC back to the last condition where it was working well. You can use various Windows 10 utilities to do a system restoration. Sound issues at the very worst are reversible too.