Hello, just purchased 16gb Nexus 7 at local Staples for xmas for my wife, came with 4.1.2, Build number JZ054K. I have left it completely stock. On occasion it will notify me that 4.2 is available, and will then proceed to restart and begin the update process. But about a third of the way through the update (judging by the progress bar), it stops and shows the android laying down with the red exclamation point, so the update process never completes, and I'm still on 4.1.2. I have restored back to factory settings, and had it try updating again, but still will not work.
Anyone out there know why this is happening, and how to fix without rooting? Really driving me crazy. Thanks in advance for anyone's help.