I've recently received a Pipo X7S from geekbuy*** and I'm experiencing several issues that bother me a lot

- I have disabled the dual screen boot selection (windows/android) ... And I have no idea how can I go back to default settings and have again this screen displayed during boot up

- If I have a SD Card plugged-in the SD port during boot, the PIPO does not want to boot up (black screen)...
- And right now, my PIPO always boot on the BIOS in the "recovery" tab settings !


And to answer further questions, I didn't mod / change anything the file system since I have received the PIPO. The only things I have done are:
- Disable the dual boot screen (thanks to the icon in the upper left of that screen)
- Apply of Windows updates
So how can I fix all of that (firmware restore?) ? And it doesn't matter if I lose the Android partition, I don't want to use it and I would prefer to have it removed!
Thank you
Note: Sorry for my english
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