for sure in french there is a tutorial..
be sure that the tab is set to WINDOWS BOOT, not ANDROID.
you must have a USB HUB, connect to it a mouse, keyboard,
then download and extract this :
https://mega.nz/#!mBVGQSTD!NRayzLDoTgTm ... cIq0mKJi84in the windows flash folder, you have to put the content of the USB1 folder on a usb flash drive formated to fat32 who must be named "WINPE"
and the content of the USB2 folder who must be on a NTFS DRIVE named "WINDOWS" (so you put the images folder on the disk) (DISK DRIVE OR FLASH DRIVE like usb key..
but NTFS !!!),
connect all to the HUB, and the HUB to the tablet.
press power, and with the original keyboard press quickly escape .. it will boot into the bios. (you can try with a non original keyboard too, directly on the USB PORT of the tab... some people say too that if you plug the tab to the PC with the USB CABLE, and then boot it with power + volume down, it will boot into the bios...not sure but you can try. anyway you will need a keyboard to navigate in the bios. try with a usb one, or bluetooth one with unify))
go to BOOT MANAGER, if everything is correctly connected you should see your usb flash drive, select it to boot on it, and it will install windows . you have nothing to do. if some questions arrive, just press OK. don't worry about the activation. it's already include. remember to plug a keyboard and a mouse to the hub, with both drives with correct names. WINPE for USB1 in FAT32, WINDOWS for USB2 in NTFS.