This is a operating system issue. It's not clear from your post which operating system you use. If it's Windows 7 or Windows 10, just type "default" in the search box (normally at the lower left corner of the desktop). Or you can go to Windows Settings -- in Windows 10 you then want to choose Apps and then Default apps. You can choose the default email app, music player, photo viewer, video player, and web browser.
Bill
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