Windows 10 has built-in apps to handle just about every file you want to open or task wish to complete, but most people have their personal preferences when it comes to accomplishing specific things. For example, you may not want to use Groove Music as your music player, but rather Winamp to open all your music files. In Windows 10 setting your default choice for opening files easy enough to do — here's how. .
Change default apps in Windows 10 ;
1-On the Start menu, select Settings or type Settings in the Search box.
2-Select Apps > Default apps. Select which default you want to set, and then choose the app.
3-You can also get new apps in Microsoft Store. Apps need to be installed before you can set them as the default.
4- To choose default apps by file type (for example, .pdf files), scroll down and select Choose default apps by file type.
5- Open Default apps
6- Click on the app you want to change under the category of your choosing. You have some options for categories: Email Maps Music player Photo viewer Video player Web browser
7- Click on the app you want to make the default.