Windows 10 uses the new Photos app as your default image viewer, but it still includes Windows Photo Viewer — kind of. Microsoft has hidden Windows Photo Viewer on new Windows 10 systems.
Upgrade a Windows 7 or 8.1 computer to Windows 10 and it’ll have Windows Photo Viewer available as an option. On a fresh Windows 10 install, Windows Photo Viewer isn’t even presented as an option.
ADD REGISTRY KEYS TO ACTIVATE WINDOWS PHOTO VIEWER
We’ll need to add the same registry entries that were present on Windows 7 and 8.1, and are still present on systems that upgraded from those old versions of Windows. To do this, download the Activate Windows Photo Viewer on Windows 10 registry hack. Unzip it, double-click the .reg file, and it will be added to your system.
SET WINDOWS PHOTO VIEWER AS YOUR DEFAULT IMAGE VIEWER
You can now right-click a type of image file — for example, a .png, .jpg, .gif, or .bmp file — point to “Open with,” and select “Choose another app.”
Click the “More apps” option, select Windows Photo Viewer in the list, activate the “Always use this app to open .___ files” checkbox, and click OK.
Windows Photo Viewer will now be the default image viewer for that type of image file. You’ll need to repeat this process for each type of image file you want to open with it. In other words, whenever you open an image that opens in the Photos app, just close the Photos app and use the “Open with” menu to associate that file type with Windows Photo Viewer. You should only have to do this a few times.
Note that Windows Photo Viewer won’t appear under the list of programs in the “Open with” dialog unless you run the above .reg file.
You could always use another desktop image viewer, of course. This will be necessary if Microsoft ever completely removes Windows Photo Viewer from Windows 10.
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