I'm not sure if there are any tweaks or been discussed before, but when you open the Windows 8.1 photo app to view a photo, it still shows the last photo viewed for a second before it shows the newest photo I clicked. In Windows 8, it was instant, never showing the last photo for a second. Try it if you want to see what I mean. Click a photo to open, close it out, and then try clicking on a different photo. It will show the last photo for a second before it shows you the different one. Why is it so slow? Never did this in 8.