I downloaded and merged the registry hack for bringing Windows Photo Viewer back on this W10 laptop, but it does NOT work...after I get the window saying the registry keys have been added successfully, I got to the settings/default apps and click on photos and Windows Photo Viewer STILL does not appear in the list. I've also downloaded a random jpeg, saved to my desktop, right clicked, open-with and it does not appear there either. When I first got this computer I added it just fine within minutes. Recently I got the blue-screen startup and had to restore original factory windows 10 just to get into my computer...of course now the Windows Photo Viewer I had successfully gotten back once is now gone and I cannot get it back no matter what I try. Any suggestions?????