how to change my new email address over to the old computer ..the older computer still has the previous email address on it Now that server has closed so I need to rid the old computer of the old email address
Are you talking about a particular program such as Outlook, Live! Mail, etc?
You shouldn't need to change over your e-mail address from a old computer to a new computer unless you're running Windows 8 and have a M$ account on it.
I'm assuming it's a mail program you're making reference to. Get us the name of that particular program and we'll be able to help you further.