So the old windows photo viewer which was used on Windows 7 no longer exists on Windows 10 because Microsoft decided to replace it with Photos. Myself personally, I prefer to use the windows photo viewer from Windows 7 much more than the Windows 10 Photos, therefore I looked for a way to get it back. So I found stuff on how to do it and just decided to share here with anyone else that may want to do this.
So all you need to do is download the .reg (registry file) file and double-click it to run it and click yes. Once you do that, you can set the default photo view to the old windows photo viewer by right-clicking on the photo and setting it to always open with the program.
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