It is true that today the graphic viewers are becoming more complete and professional, besides being full of functions and tools, but if you are looking for exactly the opposite, that is, as simple as possible, then what you need is ViewPhotos.
With ViewPhotos you have at your disposal an extremely basic, simple and austere graphic viewer, equipped only so that you can view each of the images you have on your computer. The only additional tool with which it comes equipped is a utility to eliminate the annoying effect of red eyes in your photographs.
ViewPhotos is ideal for those who seek simplicity first and foremost.
You can free download ViewPhotos 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.