If the Device Manager doesn’t show the sound card or unknown devices, there are chances that the sound card is disabled in the BIOS of your desktop computer or laptop. Search BIOS (UEFI) in the section Advanced - Peripherals - Onboard Devices for something related to 'Onboard Audio' and make sure that it’s enabled. Also, there are a few more ways to fix the sound issue if the methods described in this article didn’t work. If the “Audio outputs” section of the Device Manager displays output audio devices, try removing them, and then go to Action - Scan for hardware changes. If you use a Realtek sound card, have a look into the Speakers section of the Realtek HD software tool. Enable the proper configuration, and in “Device advanced settings,” check the box for “Disable front panel jack detection” (even if you encounter issues when connecting to the back panel). If you have a particular sound card with its own management software, check if that software contains any settings that could cause the problem. If you have more than one sound card, try to disable the one you are not currently using in the Device Manager. If this problem emerged after updating Windows, and the method with fixing drivers didn’t help, try to restore system files integrity with this command: dism.exe /Online /Cleanup-image /RestoreHealthCopy Try to go back to one of restore points if the sound worked properly before.