I have my mac set with a password so any changes, including updates to the Opera browser, must take place with my approval by entering the system password. Every 1-2 hours, and at least each day when I go on my computer, I am confronted with this mindbogglingly annoying popup in the center of my screen that looks like this:

I always click cancel because I don't want to lose my open tabs, logins, and bookmarks, and oftentimes I am busy working. How do I stop this from happening and disable it completely? Sometimes it happens every half hour, and it occurs when Opera is up to date.