My problem is described in this.
I am trying now to flash a cleam stock ROM on my device.
I am following the instructions from this.
On RSDLite, the flashing process fails with the following message:
6/18 flash "cdt.bin_signed" -> Phone returned FAIL
I will try now to usesoftware instead of RSD Flasher.
The problem was: by device has its bootloader locked and therefore I shouldn't have tried ClockworkMod. (I thought I had used it in my device before)
The solution is: follow the RSDFlasher guide above to flash a clean ROM. Do not flash an older ROM!
The ROM I used for my JellyBean (4.1.2) can be found
Doing this, fixes the Bootloader and formats the corrupt files.