Hi Sarah,
I noticed that there is indeed software for your unit. https://www.brother.is/support/ads-1800w/downloads If you follow my instructions in the previous post I am quite sure your scanner will work. Remember though to first uninstall all other instances of this scanner in Settings, Devices first to ensure that you do not have multiple instances of the device. Also, you may have some system files that are possibly corrupted, run from admin terminal sfc /scannow and confirm that your system is not corrupted. Also confirm you have all windows updates completed.
I have since posting installed at least 3 other Brother printer models for various customers and it definitely works