I have Windows 10 on my PC.  I have been using Live Mail to receive and send mail to my email provider with no problems.  Today the email was working fine and then it started asking for my password every time I tried to send email.  I would enter it and get an error message indication that it was not a valid password.  I called the provider and they had me login directly to their web site and try the password.  It worked.  Went into accounts and properties in live and re-entered the password.  My provider check the setting and the servers and they are correct.  I still get the same error and cannot send or receive email.  Does anyone have any suggestions?

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