WINDOWS LIVE MAIL PASSWORD AND ID PROBLEMS

Live mail suddenly asked for a password which it never did before. Wouldn't recognize existing PW. Deleted the account and re-added it with a new PW only to get the same pop up error msg wanting an account name and PW. But it won't recognize anything I throw at it!! I can enter the account going through Xfinity browser but that's the long way around rather than just clicking on the mail button on the task bar. Don't understand why I can't eliminate the account and start over. Also, is Live Mail a subset of Outlook or are they the same?

***Moved from Email  / Adding email accounts***