For the first time since I’ve been using yahoo messenger I encountered this error “Account locked” this morning while trying to log in. According to this post I found on some sites, this occurs when somebody has fail when trying to log in on your messenger for several times. It will be locked automatically for security precautions within 24 hours.
Good thing there’s a solution included. Go to yahoo website and log in there. Be sure this time to provide the correct details. Problem solved!