Re-download the firmware. Use XperiFirm to create a fresh FTF, or verify the MD5 checksum.
Below is a structured "paper" or technical overview of the software's role in Android device management. Technical Overview: Flashtool Utility for Sony Devices 1. Introduction flashtool-0.9.11.0-windows.exe
: Installing Busybox, custom kernels, and clearing Dalvik cache. Download and Availability Re-download the firmware