Each part of OS is playing good role so the user will keep busy in work. In some cases if a component will show some error than it is strange for nonstop working. So all components are so necessary to run your PC in regular mode. If we take a deep look into Windows default image viewer than we can decide that there is some difference in every release. However these parts of Windows will increase or decrease user waiting time. Therefore XnView is advance program that gives easy ways to view pictures saved in computer.
Our research shows that loading time of Windows 10 image viewer is huge comparing to Windows 7 pic viewer. In exactly the same way the WMP is faster in Windows XP comparing to later versions. Both programs are changeable so if you are getting bored from slow and lazy components of OS than leave them. You can use external image viewer like Xn View to see images in HDD with advance tools.
As you can see the above screenshot where it shows clear interface with large thumbs of target images. So you can view thumbnails of all images inside one folder to pick specified ones easily. Ultimately it is efficient and powerful utility to use it as default image viewer. Moreover it will show size, dimension, name and colors of selected image in bottom line.
Furthermore you can printout any image or set an image as desktop background. You can slightly edit e.g. rotate, resize, crop and save target photos. Although it is light and fast image viewer than ever before.