If I change my password/email whatever for my Microsoft account will it sign my xbox...

I am having this exact same problem. I know my email and password perfectly and I can sign into my account on the xbox website and microsoft, but it says my password is wrong when signing into xbox. I have tried changing my password several times and still
no resolution.

If you've forgotten your email address see this page:
http://support.xbox.com/my-account/microsoft-account/forgot-microsoft-account-solution If you're logged into the same account on the website right now it will be easy to find it. From then you can change your email address using this page:

http://support.xbox.com/my-account/microsoft-account/change-email-sign-in-for-microsoft-account (if you want).

Also, please use this page to reset your password, no matter if you have the email address or not:

https://account.live.com/password/reset

So here's what I found out. Somehow my microsoft account had been deleted or something, basically when I went to live.com or whatever it is, it told me my microsoft profile is no longer able to be used. I had to change my account email and password and then
re-download my profile to my xbox.

Hi guys. I had this same issue today. Right email and password, but error saying there was no such account/password. So, I followed various suggestions here and elsewhere with no luck. I then went to my Microsoft Live email account, of course signed in with
no issues, but when I tried to change the account password, it insisted that the password was wrong, even though I had just signed in with it!

So, I finally just signed out of Live and did the password recovery thing. I had the reset code sent to my cell phone, entered the reset code on the site, created a new password that way. Then I retried downloading my profile to my xbox again, as detailed
a couple posts back and this time it worked, with the new password of course.

It seems to me that there must be at least two password servers for live/xbox. The server for signing into my email account was fine, but my guess is that the server that handles xbox sign ins and Live account security (pasword changes) somehow corrupted
the stored password. (I'm guessing this since the password workef for email, but not for xbox, nor for trying to reset the password from with in Live's account section).

So, if this happens and you can not change your password while signed into live on the web, sign out, do the password recovery, set a new password and you should then be able to DL your profile to the XBox again using the new password.

When I signed up for an Xbox account many years ago for my son, I used my wife's yahoo email address for the Microsoft account and it also uses her Microsoft password. She would prefer that her Microsoft account is not used for Xbox and therefore neither
is her yahoo email and Microsoft password.

Whatever accomplishes this end will do!

Thanks for offering to help as troubleshooting this on our own has proven more difficult than expected.