Many people have a different preference for browsers, image viewers, media players, image editors, and more. Of course, not everyone loves or continues to use these stock apps. When you have a fresh Windows 10 installation, the Photos app is already set to open JPGs and PNGs. Stock apps are set as the default for their respective file and call-handler types. All this is made possible by the stock apps that come pre-installed on the OS. When you install Windows 10 fresh on your system, the OS will let you view images, play movies, play music, and browse the internet all without installing additional apps.
