Muhammad, I'm sorry I wasn't more help. I cast my close vote when I first saw the question, at which time I think it deserved it because it was, as I said, unanswerable in its original form. As you improved it, it became clearer to me that it was specific to MS Windows, which I don't and won't use and know nothing about - so I had nothing further to add.
Other answers to this question tell me that those who do know about Windows feel that it's a very basic AD question, and I defer to their experience; that justifies closing it as off-topic for the site.
Addressing Mark Henderson's comment above, I'm sorry if you felt discriminated against, but at no time was my judgement based on anything besides the content of what you'd written. I stand by my close vote given both the original state, and the current state, of your question, but I could have better communicated why I went silent.