Chuwi hi12 CWI520 Stylus (Cherrry Trail z8350) dual boot firmware

Windows Tablets Hi12
1

Hi all,

I have a chuwi hi12 CWI520 Stylus (Cherry Trail z8350) with serial No Q64G45171002085 and i want to install the latest version of Android and Windows 10 (latest Bios - Firmware). Any help ???