The legitimate filedg32.exe is not a standard Windows system file. It shouldn't be in folders like C:\Windows\System32 or C:\Windows . It is typically found inside a temporary folder you or a technician created, often on the C: drive.
While specific internal contents of the executable are not publicly detailed in standard consumer manuals, you can find various downloadable files and related technical information on the Brother Filedg32.exe resource page . Related Troubleshooting brother filedg32.exe