We know that one of the most common problems with Windows 10 is 'sound not working issue'. So if you're experiencing this problem, then, you're not alone. Therefore, to fix this problem here are three simple ways you can try.  

1. Check your volume levels and to do that; right-click the speaker icon in your system tray, then select Volume Mixer from the list of options to ensure that your speakers are plugged into the proper jacks and the volume is turned up.

2. Save your work, close all of your applications, and give your computer a quick reboot. It is because Windows 10 update requires your system to be restarted after installation otherwise, it could cause the audio issue. So, always remember to restart your system after an update.

3. If your sound still isn't working, updating your Windows 10 drivers could resolve the issue. Therefore, regularly update your audio driver.

For, More Details:  https://articleoftheweek.com/2020/03/15/windows-10-guide-how-to-solve-sound-issue-on-windows-10-pcs/