Your Microsoft account (which used to be called "Windows Live ID") is the email address and password you use to sign in to Microsoft services such as Xbox Live and Xbox Music. When you signed up for an Xbox Live or Xbox Music account, you associated that account with a Microsoft account. (If you didn't already have one, you were required to create one.) You use this Microsoft account to manage your Xbox Live or Xbox Music account and to download your Xbox Live profile.
Cancel your Microsoft account
At accounts.live.com, sign in to your Microsoft account using the email address and password associated with the account.
Click Overview. You see the following screen:
Click Close account. You see the following screen: