My last update was KB4561608 14.06.2020. I've uninstalled it and the printer now works again !
I've been on https://support.microsoft.com/en-us/help/4561608/windows-10-update-kb4561608
and found:
After installing this update, certain printers might fail to print. The print spooler might throw an error or close unexpectedly when attempting to print, and no output will come from the affected printer.
You might also encounter issues with the apps you are attempting to print from. You might receive an error from the app or the app might close unexpectedly.
Note This issue might also affect software-based printers, for example printing to PDF.
Microsoft is working on a resolution and will provide an update when more information is available.
I'm not holding my breath!!!
Brother USA Website Instruction for Overcoming the Microsoft Windows 10 Update Error
After upgrading or updating your Windows 10 PC, you may no longer be able to print. To resolve this issue, you will need to uninstall the existing Brother software and then reinstall it. Uninstall the Brother software from Windows 10:
1, click the window icon - Brother - Brother Utilities
2, click - Tools
3, click - uninstall
4, when asked to confirm the uninstall - click OK
5, select - yes, I want to restart my computer now - and then click - Finish - your computer will restart
For USB users - Disconnect the USB cable from either your Brother machine or your computer. You will reconnect it during the software installation later.
Reinstall the Brother software:
Download and install the Full Driver and Software Package.
Click here to display all models covered by this answer.ALL THE ABOVE INSTRUCTIONS ARE CONTAINED ON THE BROTHER WEBSITE WHEN "brother printer problems after Microsoft windows 10 update" is Googled. (You will need to bypass all the Microsoft answers and scroll down the page to the Brother USA website entitled "
Unable to print after upgrading to Windows 10 or updating ..."