I wonder how many others have been experiencing this :-
You open up Live Mail. It won't connect...it says invalid username or password even though it has worked fine for several weeks. BT Desktop Help then forces one to go through the process of setting up a new password...which of course involves being forced to go to the BTYahoo web site that I never use.
I am convinced that this whole business of losing my password is a scam to force me to visit BT Yahoo web site. A good ISP doesn't just 'lose' people's passwords.
This happens on average every 2 or 3 months.