Win10 Default picture viewer is very difficult to use, mainly open when the reaction is too slow, no win7 so fast. Let me briefly explain how to change the WIN10 default picture viewer
First open the Open menu, keyboard shortcuts open or the lower left corner of the desktop icon click to open All can
Click the arrow in the diagram to set the point
Here are a number of options, click on the system, which is where the arrow in the diagram refers
Find default application options on the left menu bar
You can then see some of the default applications that have been set up, and you can see that the default application of the picture Viewer is the new viewer provided by Win10
Click on the icon under the Picture Viewer to list all the available picture viewer software and select the viewer that the arrow refers to in the diagram.
OK, this time has been set to Win7 when we often use the picture viewer.