Since upgrading to Windows 8 (probably best operating system around) I'd been trying to change my Microsoft Xbox Live account so they'd be the same but kept getting: Sorry, this Microsoft account is already associated with an Xbox LIve profile. here's a page to help with that:

Change Microsoft Account | Xbox Microsoft Account | Xbox Windows Live ID -

Why do I get a “The Microsoft account (or Windows Live ID) you’re switching to is already linked to another Xbox account” error message?