For those of you who are having issues with the Discover R740c. Here is the official tool that will fix those phones that are stuck in the dreaded boot loop, stuck on the startup screen, or can't get out of recovery mode.

Not sure what this warning is about, but the link is legit

Samsung says the issue is corrupted memory. This will upgrade the phone software to Android 4.3.

Put the phone into download mode by removing the battery, then replace the battery. Simultaneously press Vol- and Power.
On the first screen that pops up, press volume up to enter Download Mode.
Plug the phone into your PC via USB cable
Run the program and follow the prompts.

This WILL wipe all the data on your device.
This WILL NOT trip the flash counter as it is an official update process.