An App Default was Reset in Windows 10

[HappyAndyK]

If you find that your app defaults have been reset after you installed the latest Windows 10 build, then this fix will help you resolve the problem. In such a case you will see the following message:

An App Default was Reset. An app caused a problem with the default app setting, so it was reset.

Running this registry fix will stop Microsoft Edge, Photos, 3D Builder, Zune Music and Zune Video from taking over your file associations for various files types

Head over to winhelponline to see if you would like to download and use the registry fix.

Alternatively you can also manually set the default programs.

Another way is to uninstall the Update that cause this issue and use this tool to hide and stop the update from being installed on your Windows 10 computer.

[Matrix]

You can also stop Windows 10 from resetting default apps with Stop Resetting My Apps.