Having set up many hundreds of computers in my time, I can state for a fact that you can take 4 or 6 computers out of the box and set them up simultaneously side-by-side. They do not behave the same, they ask for different updates and in different orders. Some stumble over simple setups, some are fine. They are NOT all the same even though they all started with the same disk image. I'm just talking about Windows, Office and Acrobat. I have done this experiment many times and its now boring to see 1 out of 6 misbehave with the identical installs.
If you are confident you know what a computer is going to do, then you haven't had enough knocks yet
B