MacBook Air wants to make changes virus - can’t do anything?

Why not check what programs you have running at startup.

1. Open System Preferences.
2. Go to Users & Groups.
3. Choose your nickname on the left.
4. Choose Login items tab.

I can't see the image you provided very well but it's possible it's to do with one of your startup programs. Maybe uncheck all and test.

Hello, slow triathlete.

Sorry to know you're having this problem with your MacBook.

If you can startup in safe mode you may be able to download, install and run Malwarebytes to try to get a handle on this nasty critter.

Use Safe mode to isolate issues with your Mac - Apple Support

To start up in safe mode:

1. Start or restart your Mac, then immediately press and hold the Shift key. The Apple logo appears on your display. If you don't see the Apple logo, learn what to do.
2. Release the Shift key when you see the login window. If your startup disk is encrypted with FileVault, you might be asked to log in twice: once to unlock the startup disk, and again to log in to the Finder.

To leave safe mode, restart your Mac without pressing any keys during startup.

I should clarify that by uncheck I meant remove. You could take a screenshot and add them back after testing.

Oh ok, is that in safe mode or normal mode?