I downloaded and installed Kies in my Windows 7 laptop. (Toshiba Satellite.) I plug the phone in the USB, it is recognized and its storage shows in Explorer. Then I run Kies. It says there is a firmware upgrade available. I click to update. A window shows with a progress bar at the bottom, saying something like "downloading update components."
After the download goes to 100%, Kies just silently dies on the PC, no error messages, its windows just vanish. And nothing happens on the phone. My phone is not rooted, it still has the carrier-provided software, regularly updated via Play. It was bought here in Brazil.
Kies is trhe latest version, I had it check for upgrades. I also disabled the PC antivirus to no avail.