I don't know why it does that, it's rude behavior as far as I am concerned. It's like a waiter clearing the table while you are in the middle of your meal, and taking away your plate without asking. As for ConfigureDefender, the idea is like this: Microsoft intended these advanced rules to be used in Enterprise edition of Windows, as part of their paid security services. That's why they are hidden settings. ConfigureDefender makes them accessible for ordinary users, and when you enable them, it's like Clark Kent turning into Superman. But watch out.