You can follow the same operation to update the audio drivers of your computer default sound card.

Click Search automatically for drivers option to search and install the latest version of the Realtek audio driver.

Expand Sound, video and game controllers category, and right-click Realtek High Definition Audio to choose Update driver.

Press Windows + X and select Device Manager to open Device Manager in Windows 10.

You can update audio drivers to see if it can fix Stereo Mix not showing in Windows 10 issue. Build 1909 not remembering volume levels in the Volume Mixer in Sound & Audio I recently updated from 1803 to 1909 and I've noticed that the Volume Mixer does not store volume levels for any apps and instead just resets them to 100 if they are restarted. If you still don’t see Stereo Mix in your Windows 10 computer, it might because your sound card drivers are outdated or the new sound card driver doesn’t support Stereo Mix feature.

You can then follow the guide above to enable it. Go to Settings > System > About to check if there is an available update.

Before going through our list of solutions, make sure you are not running an outdated version of Windows 10. Here are some easy ways to fix the volume mixer not opening on Windows 10.

In order to start the appliance, the user has to wait for it to cool down. However, even if you are not too tech-savvy, there’s no need to worry. If overheating, the mixer automatically shuts off at certain temperatures to prevent the motor from taking damage. After this, the Stereo Mix device should appear in the list of recording devices. The most common reason why a KitchenAid mixer won’t turn on is overheating, but it could also be a faulty outlet, cord, or internal parts.

Right-click the blank area in the window and check Show Disabled Devices.

Right-click Sound icon at the taskbar and select Sounds.

Check how to make Realtek HD Audio Stereo Mix feature visible. If you don’t see Stereo Mix under Recording tab in Sound window, it might be hidden in your sound card. Read More Fix Realtek Stereo Mix Not Showing or Missing in Windows 10

My volume mixer won t open