[WindowsCentral.com]

How do I completely delete my Microsoft account?
Companies usually give you a bit of guff when you try deleting an account with them, but Microsoft has a relatively few number of hoops to jump through to do so. No matter the reason for deleting your account, the process remains the same. There are three processes on the way to completely deleting your Microsoft account. Follow these in order.

Full story from the WindowsCentral blog...