email on my Xbox is entered wrong

Try speaking with Phone Support as they may be able to help you out in this instance:

support.xbox.com/contact-us

There's nothing we can do here on the forums.

You can change the windows live ID on your account every 30 days. For instructions on how to do so take a look here

forums.xbox.com/.../153168.aspx

im having the same problem as o SIR WIGGLES o when I try to sign in it wants me to enter my email address and password so i do, and when i enter it all in and then it loads for a while and says, that its the wrong password (which is the right password) or
the email i entered doesn't have an xbox live membership, (which is the email i used to make the xbox live membership), please help me.

I am not signing in on the wrong email. I can obviously see the email that is associated with my account. I created a Microsoft account with the email and registered my xbox. I was able to reset my password and get past the character check but it still
will not sign me in even after I enter the new password. It prompts me for my password, I enter it, and the screen loads but still does not sign me in.

i've done the same, i entered the wrong email into there and now when im asked to accept the new terms and conditions it asks me to enter the email and password of an email that doesn't exist... so yeah i need to change the email that's entered