How to prevent 1.4.4 BIOS update 17R3?

Despite having previously removed the Dell update facility, this has re-appeared on my system, and repeatedly brought up notifications about the 1.4.4 BIOS update.

Today when clicking on the BIOS update notification to look for more details or to disable it, the system instead downloaded the file and is now going to update the BIOS on the next reboot.

I DO NOT WANT AND DID NOT AGREE FOR THIS TO HAPPEN!

How can I prevent/abort the update at this stage? Can I replace the queued BIOS update with another, older version at this stage? Currently running 1.3.6 and it has been pretty good on this system.

To make matters worse, Windows is also in the queue to update at the next reboot (Win 10 Home, so this is going to happen at stage, no choice on my part...although I can change the active hours to prolong the pain for a while longer)