Go to Control Panel >> Sounds, speech, and Audio Devices icon >> Sound Tab >> under Sound Scheme select
Windows Default option >> press Apply.
Now Under " Program events " Customize event sounds.
Re: Adding Sound Effects To Windows Events
Click "Start" and then click on "Control Panel." If you are using an older version of Windows, click "Start," point to "Settings" and then click on "Control Panel."If your "Control Panel" is in "Category View", click the option in the task pane that says "Switch to Classic View."Double click "Sounds and Audio Devices."Click on the "Volume" tab. Under "Speaker Settings" click "Advanced". The "Advanced Audio Properties" dialog box will open.Click the "Effects" tab and then click "Add Effect."Click the sound effect you want to add, then click "OK."