MacOS reinstalling OS onto boot drive without asking for permission

I turned my computer on as I set my clover settings to automatically boot into my boot drive so when i turn my computer on it goes straight to the Apple boot logo.

I just turned my computer on and its on the installing macos onto MacintoshHD (my boot drive name) 40 minuets remaining.

There was no mention of it going to that screen no configuration selecting drive to install on etc I panicked and turned forced the computer off (may have been a bad decision now thinking back)

The only thing I did was tell it last night to update and shutdown (update from my previous version of mojave to the latest) it displayed the apple logo with installing update and then shutdown.

Is the installer just part of the update thats going to now take 40 minuets or am I about to get a fresh copy of macos installed?

This is the screen i saw

submitted by /u/btchimsway
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