If you just miss the old viewer on your own Windows 8.1 PC (not portable), use the official registry restoration method from Microsoft’s support docs. If you need a portable viewer, download JPEGView Portable or IrfanView Portable from their official websites instead.
A few exist (e.g., IrfanView Portable , FastStone Image Viewer Portable ), but they are not “Microsoft Photo Viewer.” microsoft photo viewer download for windows 81 portable
If you need a longer, more formal academic essay, I recommend expanding the sections above with additional technical details, user testimonials, or a comparison of alternative portable image viewers. Would you like help with any of those expansions instead? If you just miss the old viewer on your own Windows 8