I recently purchased a refurbished Viewsonic 10s, but it doesn't have google market place. It doesn't play youtube and so on... I wanted to upgrade to a better version, but I am not getting the instructions... And if I do get the instructions the files I need to download are not available any longer. I was watching a youtube video on how to do this but... I pressed on the two buttons together on top for more than two seconds while the tablet was attached to the computer but nothing happened... even for longer.... I would appreciate if anyone could update the links and instructions again and post it here... thanks.