Thrustmaster T128 Mode D'emploi page 6

Note: If nothing is displayed in the Device or Firmware sections, repeat the
entire procedure from the beginning — but this time connecting the USB
connector to another USB port on your computer (or perform the procedure on
a different computer).
Click OK to carry out the firmware update.
IMPORTANT: DO NOT DISCONNECT your racing wheel from the USB port on
the PC without being prompted to do so, and DO NOT UNPLUG the racing
wheel's power supply during the firmware update!