My Microsoft Account has a mail address *** Email address is removed for privacy ***.  Now I have been shifted to outlook.com.  All aliases of outlook.com have the same password.  If one is compromised then all are compromised.  And what is the use of having so many aliases.

Secondly, my login to my laptop requires me to type in the Microsoft account mail address and the password.  If I want to change this password then how do I do it.  There is lot of confusion.  Please clarify.