Disable automatic download "Install macOS Monterey.dmg"

This is a very unusual occurrence and would suggest you gather all relevant information about both the computer and details of this situation and do one or both suggestion below;

To be honest, if you have disable the Auto Update - do not know how to stop this from happening again.

Perhaps one of the may More Learned Contributors can assist on this specific issue

1 - Product Feedback and file a Bug Report

2 - Get Support Choose a product and we’ll find you the best solution. Start now and start a Support Ticket with Apple

Out of interest, mine, can you give us a Screen Shot Similar to the below image of an older version of an Installer for Monterey using the two keyboard combinations command I and post back in a Script we can read.

Sorry, can not read in your Native Language Script

EDITED

I have the same issue, but it is only occurring on my external macOS Catalina boot drive. the "install monterey" app keeps showing up in my application folder. I have automatic updates turned off, but every time I delete the monterey install app (and empty my trash) it eventually returns. but, since auto updates are disabled, it hasn't yet installed itself. so I've learned to just ignore it. as long as i don't Initiate the installation by double clicking the app, it just sits there doing nothing.

Firstly, DMG files for Full Versions of macOS Ceased with OS X Sierra 10.12 released in 2016.

Secondly, has the computer been restarted after the Monterey 12.5 was installed ?

Thank you very much 😀

Yup, looks totally right to me.

The why it happens is a question mark for me.