No, it was not forced.
You could (should?) have chosen a custom installation.
I was not provided the option of a custom installation when I clicked the 'Update Program' button below to update the client PC.
It simply generated the update task. When the task completed, the computer was rebooted, and the prompt appeared in Chrome notifying me that an extension had been installed. Much in the same way that when the system was updated before this, SafeZone browser was silently installed. No prompts to customize the installation at all.
If there is a way to customize what components are installed when systems are updated, please inform me.