Had an issue with SSA disappearing off the screen on a laptop when launched. I read all the earlier threads about Java but still the same.
Then I plugged an external monitor in and it was there! Obviously I can't carry this around but the laptop must have been used for a presentation at some time.
I then pressed [Windows} + [P] and turned off extended mode as it seems Windows doesn't always realise if an external monitor has been connected.
Now back in action!