Turned on my computer yesterday and a screen came up, in Windows, counting down to a Win 10 download/installation. I couldn't find a way to stop or cancel it, so I shut the computer down. I assume that the next time I turn it on, it will still be counting down. I do not want to use Win 10 for now. did not knowingly authorize an upgrade and do not want to have it installed and then have to roll back to Win 7 (the current system). Does anyone know how to stop this, given that I may only have a couple of minutes to do it? I am not a computer whiz, so would be very hesitant to try tinkering within the system. Can't imagine that I am the only one to have this happen.