Any applications you've installed that support changing the event sounds can also be found here. There are three categories of Windows sounds Windows, File Explorer, and Windows Speech Recognition.
If you make any changes to the sounds in Program Events, you can click on Save as. If you've installed any third-party sound themes, those will show up here also. Sound Scheme gives you the option of choosing from Windows Default or No Sounds. There are two categories - Sound Scheme and Program Events. You can open System sounds one of two ways: TIP: Hard to fix Windows Problems? Repair/Restore Missing Windows OS Files Damaged by Malware with a few clicks