I having trouble with my ST 16, when I turn it on it's asking for a password that I have no idea what it might, never did it before, I tried everything I could think of, no luck. Shortly after that it just shuts down all together, don't know where to go from here....any help with this would be appreciated. I'm am 73 and needless to say I'm technologically challenged, I'm not even sure if in the right place to be asking for help....coolcooch