I got no problem so far.
Something went wrong with your SUS update.
Try to reset all your user data: impostazioni --> backup e ripristino --> ripristino dati di fabbrica
Remember that you will loose all your apps and your google account.
If you can't solve, try to flash a FTF with Flashtool.
Keep unzipping it until it shows I've had this problem before as well with these compressed files I use 7zip to unpack these compressed files I find that once I've opened it on my computer I than again have to go into it's downloaded aria and unpack it again
Flash successfully on T Mobile branded phone running 4.1.2. Unticked DATA under wipe and still have all my apps and data. Hopefully will not have any FCs but if it happens will wipe data. Thanks for this thread.