Can't remember my password.

I am trying to transfer my account to another laptop. I can't remember what my account password is. I have been trying for several weeks now without success. Microsoft wants to send details to an address that is no more and I can't change my info because of this dilemma. It's catch 22. I've filled in the requisite forms over and over to no avail. How do I get passed this brick wall of Microsofts?