The sound alert is named text messages but it will apply to messaging apps. These sounds only apply to UWP apps that send you messages. Next, click the Browse button on the Sounds tab, and select the audio file you downloaded. If you want to use a custom sound, download it and make sure it’s in WAV format. If you want to use a Windows default sound, open the Sounds dropdown next to the Test button and select a different one. You can select another Windows default sound, or you can choose your own custom sound. To change new message notification sound, you have two options. It’s the exact sound that plays when you get a new message on UWP messaging apps like Skype, Telegram, or Slack. If you click the Test button, you will be able to hear the sound configured for this event. Look for ‘New Text Message Notification’. Under Program Events, you have a long list of sounds. On the Sound window, go to the ‘Sounds’ tab. In the Control Panel app, go to Hardware and Sound>Sound.

You can’t open it from the power user menu if you’re on the Creators Update however, you can still access it from the Apps list, or search for it in Cortana/Windows Search.

Windows 10 no notification