@iDeny: i guess he wanted to know the model-nr of your HI12. You can find it at the back of your tablet. My Model-nr is CWI520.|
Here is a short step-by-step instruction how it worked for me (after a lot of trial and error ):
For flashing your tablet you need the power supply, a keyboard, 2 USB-sticks (one should have at least more than 4 GB!), a working PC or windows-tablet for preparing your USB stick and thats it (It didnt work for me with USB-Hub, i tried 3 different ones, also an active powered one). Your tablet should be connected to the power supply during the complete process, it needs a lot of power for that.
Download the "Hi12 Windows10 64bit.rar" above from link below "Hi12 flash WIN10 system firmware download" and Unzip the file with the working computer, where you prepare your USB-sticks.
Attention: The first version i got from a colleague, without any warning this file didnt completely download/unzip, it was corrupt and didnt work for me, the second one i downloaded with firefox myself was also corrupt. 3rd try with Chrome worked fine (USB2/images/install.wim file is 5.369.788 - thats why you need one usb-stick > 4GB)
Plugin the first USB-Stick to your PC, this one at least should have a size of 512 MB. You have to format it as a FAT32 drive, and call your drive "WINPE"(you can do that also in the window for formatting) . When you have done this, copy the content of your USB1-folder to that USB stick (just the 4 subfolders and 3 files, not the USB1-folder itself). This stick is going to be your boot-stick.
Plugin the second USB-stick with a size > 4GB (because of your install.wim file) to your PC. Format this stick as NTFS and also call it "WINPE". Then copy the content of USB2-folder to that stick (so just the "images" folder with its 3 files).
Info: I dont know if you need to call your USB-sticks "WINPE", its just from another chuwi-tablet-flash-instruction and it worked for me, i didnt try other names.
Now you need to make your tablet boot from your USB-Sticks instead of the internal Hard-Disk. (In my case at the end my tablet wasnt able to boot from the Hard disk, so changing the boot order wasnt necessary, because it directly took the USB-stick - If your tablet isnt THAT broken, you should change the order ). So first shut down your tablet (holding Power-Button for at least 10 seconds). Plugin your keyboard (i would prefer a wired one) into the USB 3.0 port (the blue one) of your tablet. The other one didnt work for me in the first boot sequence (its also important in the next steps). Now you need to start your tablet in BIOS, so Press and hold the Power-Button + Volume Up for at least 5 seconds (If you see the Chuwi Boot screen Press Volume Up again). Now your tablet should directly show up the BIOS menu. Use the keyboard to switch to the "Boot" tab and change the boot order (just place "Hard Disk" at the end of the list (my order was #1 USB Lan, #2 USB Hard Disk, #3 USB Key, #4 Hard Disk). Now Press F4 (Save and Exit) and press Enter (Yes). Shutdown your tablet by holding the Power-Button for 10 seconds.
Plugin your USB sticks. You need to put the FAT32 stick (USB1 - your Boot stick) into the USB 3.0 port (blue one), the NTFS stick (USB 2 - image folder) into the other one. Power on your tablet (pressing the Power button for at least 5 seconds). Now your tablet should boot from your USB stick, you should see a command prompt aber the Chuwi logo. If not, read my comment below the Instruction.
If you see the Command prompt, there should be nothing to right now, the scripts will run automatically. after appliyng the image, the tablet will shutdown. Now you have to boot again (5 seconds, you know), you will see the chuwi boot screen and the "getting started" message below. This will take a few minutes again. After that, your tablet should reboot automatically, you will see the windows 10 starting dialog for configuring your windows - thats it.
As i mentioned in the last step, there is probably something that could cause a problem while booting from your USB stick. I already said that i did a lot of trial and error. At the beginning my tablet still tried to boot from my hard disk and boot windows, but this didnt work. After a lot of trials by using the boot menu (pressing F7 while tablet is booting with chuwi logo), also my windows boot mode broke, so in the succesful try i didnt need a keyboard, because the tablet had to boot directly from a USB stick. If you get problems in here, maybe we can find a solution (probably deactivate windows boot mode in BIOS, maybe using USB-hub, maybe using and OTG-adapter for keyboard instead of power supply...)
Hope you will be successful,