I have a cube mix plus tablet pc. After i open first time i reset windows 10 to factory setting. Then i made partition to made 2 drive 100 gb and 20 gb. I installed an android os(phoenix os) to 20 gb drive. I used it little and uninstall it. After that windows 10 could opened. But during microsoft office installation it stuck. After that windows 10 couldnt open and give an error(unmountable boot volume) i couldnt make repair process anymore. There is a black screen and only mouse cursor and touch screen input can be seen and active.