I can't guarantee everything is there but that's the best you can do.
https://account.live.com/password/reset
Basically, I have an old email account that I use on my Xbox. I haven't been able to access this email account because I forgot the password as its around 5 years old, and I also can't remember the answer to the security question. I imagine I would have done something like a combination of random letters for the password and question, until I formatted my old laptop and lost the access. Anyone have any ideas on how to get the access baKck, or at least be able to change the password for XBL?
Cheers

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic