Now, this page will show you how to set Windows Photo Viewer as default image viewer in Windows 10. However, some users are used to the old Windows Photo Viewer and want to make it as default image viewer in Windows 10.
When you double-click on one picture to view it, by default Windows 10 will automatically run the Photos app to open the picture. The default image viewer in Windows 10 is the new Metro Photos app instead of the classical Windows Photo Viewer. How to Set Windows Photo Viewer as Default Image Viewer in Windows 10
