Any one help with a problem I have with windows 8

When I set up my computer, In my setting I put in my email address in the Pc setting, now this email address is obsolete as the provider went bust or something. I have put in a 2nd user (me) with my new email address, but now I want to sign into the account with my new phone it won't let me excess it because of this primary 1st account. How can I delete it or change it?

PLEASE HELP

You need to log in to your Microsoft account and change your primary account to the new one - it'll currently be an alias. You can find out more about it here