A bit confused.. "it sends malware to the old address book"
Is the old aol address sending the mail, or is it addressed to the aol old addy?
Don't understand how you can still be collecting from an email address if you haven't set up an account for it since you got new computers?
Have you tried logging on to it's Webmail to see if it is still active (despite you thought it cancelled 5 years ago)
If you are receiving emails from it to your new email address, how does 'it' know your new email address?
Can you explain in more detail what is happening please.