Like Windows, macOS makes having apps, documents, folders or server connections launch automatically whenever you log in to your Mac as easy as dragging them to theSystem Preferences → Users & Groups → Login Itemssection.
Sometimes, one or more Login Items may cause software problems or prevent your computer from starting up properly.

Rather than remove all of your Login Items permanently, here’s how you can temporarily prevent them from opening automatically when you log in, without needing to adjust your settings.
Temporarily stopping Login Items from opening when you log in
1)Restart your Mac by selectingRestartin the Apple menu, or press thePower (⎋)key to turn on your computer if it’s already turned off.
2)Do one of the following:
ensure you hold theShift (⇧)key when logging in, then release it when you see the Dock. This shall prevent your Login Items from loading.
To prevent Login Items from loading when you restart or turn on your Mac, hold down theShift (⇧)when the macOS progress bar shows up on the startup screen. The startup screen appears after the startup chord plays. Release the key when the desktop shows up.

And there you have it, this is how you prevent both Login Items and previously opened Finder windows from being launched when your Mac boots, without removing any entries from the Login Items preference pane.
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