Maybe of some help to someone. I tried 15 times or so to install latest Z7 firmware update. ( i know. Madness. doing the SAME thing over and over. A form of madness ) Downloaded onto desktop. ( windows ) Dragged and dropped onto camera formatted memory card. It was there, i saw it. Into camera. NOTHING. Wouldn't install, wasn't even showing. I then formatted the card ON THE COMPUTER. Dragged the update onto the card. Into camera. HEY HO. It was recognised and updated the camera.