I have been using Windows 10 some time, for no apparent reason my wife's live.co.uk "E" mails stopped recognising the password & cannot be used.

We keep getting told wrong password, I have reset it several times through Windows 10, this allows me to log in but Windows live is still not accepting the password. My main account "E" mails are with btinternet.com & these work. Can any one help please?

[Original title: Melvyn]