I have had my yahoo account since I was 13 years old and I know the password. On my phone, computer and any other device, it is asking me to log in to my account. It keeps telling me my password is invalid, but I know it is the right password. The notifications for my yahoo account still pop up on my phone and computer, but every time I click on them, it tells me to enter the password. I think that someone has changed my password, but I need the account because it has everything in it.