If you suspect a fake brother filedg32.exe is running:

: The machine’s LCD will display black boxes, indicating it is ready to receive a new firmware file via the FILEDG32.exe utility. Why People Seek It

While specific steps vary by model (e.g., HL-series vs. MFC-series), the general workflow follows this pattern:

: The printer's LCD will typically show a "Receiving" or "Flashing" message. Once finished, the machine reboots automatically. Is FILEDG32.exe Safe?