I can se a lot of problems with Windows 8.1 upgrade. I DON'T, all works perfect, BUT.
I have a problem with the photopaper size.
I can't choose the 10 X 15 cm size paper in the drop down menu.
A lot of different sixes, but not 10 X15 cm, or 4" X 6".
The computer don't recognice the phototray.
Then i can put the phoptfile into a SD card, and put these card into my printer, then it works.
Printer Photosmart 6520 All in One, Windows 8.1 64, the newest software, full pack is installed.
I'm livin in Denmark Europe.
Vorm