Enable WIndows Photo Viewer in Windows 10 Rumi, June 13, 2018 Default windows “Photo” app is clumsy at some point, missed the earlier “Photo Viewer” program. So, going back to root and after googling, here’s a small hack to enable “Windows Photo Viewer” in windows 10 edition. Download the photo.zip and unzip it. You’ll get a photo.reg file. The file is created from this forum http://www.tenforums.com/software-apps/8930-windows-photo-viewer-gone-2.html#post290818 Double-click on your new REG file to merge it with your Windows Registry. You will need to click through the User Account Control and a few other windows to allow the file to make changes to the Registry. Basically you are done. Next what you need is to right click on any JPEG/JPG/BMP/PNG/GIF file that you want open/view using legacy windows photo viewer and make it as default. Administrations Configurations (Windows) Windows Photo Viewer