Right-click the default device Realtek Digital Output and click Properties.
Next click Hardware and Sound -> Sound.You can press Windows + R, type control panel, and press Enter to open Control Panel on Windows 10.If you use Realtek audio driver but has no sound on Windows 10, you can try to disable audio enhancements to see if the issue can be fixed. To install the latest Windows 10 updates, you can press Windows + I, click Update & Security -> Windows Update, and click Check for updates button to automatically install the latest Windows updates on your Windows 10 computer. You can also check for Windows updates to update your OS to the latest version. It might be caused by the driver incompatibility issue.
Realtek audio driver is not working on Windows 10. Alternatively, you can also go to Realtek official website to download and install the Realtek audio driver for your PC.