I’ve been using this fix since Win 10 first came out, but this past year, after one of the updates, not all pictures will open up. Click the 'More Apps' option and scroll down the list, it will not display Photo Viewer among the choices, because it is hidden by the operating system. Select the 'Open With' menu item and click on 'Choose Another App'.

You can verify this by selecting any image and right-clicking on it. Well, if you like the simplicity of the legacy application, you are probably going to be disappointed to hear that Windows 11 does not include Photo Viewer by default. The interface may appear slightly confusing, if you are coming over from Photo Viewer. It is rather sluggish to open, it takes an extra second or two to load, even when you are trying to view images which are just a few KB in size. The main reason why people do not like the Photos app is due to its performance. The Photos App isn't bad at all, in fact it comes with a built-in Video Editor, and I think it is quite useful. If you look at the previous iteration, it also had some unwelcome changes such as the Photos app, which replaced the Windows Photo Viewer. Windows 11 brings a slew of new features, some of which have not been well received among users.