[Teclast X98 Air 3G] Thundermeister:
*** I would count these instructions as obsolete due to some gripes with drivers, please refer to JonMichaels instructions in a later post. I will however leave this post if someone needs it as reference or has problems with the other method ***

Ok, so i managed to install both windows 10 32-bit and windows 8.1 pro N 32-bit!

I would not recommend windows 10 since i had a couple of issues there, but win 8.1 works very well with some small gripes that we might solve together!

First a small guide :).

Guide to install windows 8.1

For the most part i could use the instructions in the thread for teclast x98 air 3G. I did however not use Teclasts bing version of windows, i created a win 8.1 pro iso instead and embedded the drivers.

Step 1: prepare the image

I only used one usb-drive for my installation (not the WINPE way as described here ), at first i tried with a 32gb drive but it did not work, a 8gb kingston memory did however work. So you might have to test a couple of drives to get it to work. Checkout this post to grab Wintoolkit and Rufus, you will use wintoolkit to inject drivers and refus to prepare a bootable drive.

Once you have these tools you will need to find a windows 8.1 pro 32-bit image to use, i took mine from dreamspark (for students), but you should be able to get one from microsoft directly. Do however mind that i could not bypass the "insert key stage" for a trial version, i had to get a key for this. If you want a fully working win 8.1 pro you will need a key when you install the OS (I don´t know where they are the cheapest, perhaps G2A).

Download the drivers for Teclast x98 air 3G and extract them to a folder. Start up wintoolkit and press all-in-one-integrator to start the embedding process. Browse and select the image that you downloaded earlier. Select the drivers tab and press the Add selection in the menu bar, select the folder with the teclast x98 air 3g drivers, then press start and select a place for the modified image to be storded. Once this is completed (takes some time) close the all-in-one-integrator and select ISO maker, select a place to create a new iso and name it something like "win8.1".

Insert the drive you want to use as a boot-device for your newly created image. Go ahead and start up Rufus and select the drive you want to use. Under partition schema make sure that the GPT partition schema is selected, also make sure that you format it in FAT32. Press the little CD symbol and select the image that you created earlier and press start (this will also take a while depending on the drives writing capabilites). If all goes well you will now have a bootabel usb-drive with win 8.1 pro that the tablet will accept.

Step 2: Flash the bios with the one given to us by nandika6

The next step is to flash the bios to the version that nandika6 gave us. Follow the instructions in this post and use the commands for "if you have not rooted your device".

I had some gotchas with this, simply downloading the adb driver did not work as i could not detect the device in the command prompt. This was solved when i ran the intel manufacturing tools and got the correct usb drivers for the tablet. I did however not do anything with these tools ( look into this if you dont want to keep windows forever, said something about that, i will however not switch back to the buggy Android).

Step 2: Install windows

Once the flash is complete you will have to shut down the tablet and insert the boot-drive. If you end up in the EFI-Shell this will probably be due to the usb-drive not being compatable (this happend to me), in that case repeat step one with another drive. It could also be because the drive is not first in the boot priority, connect a keyboard and pres ESC when booting to get to bios, select the drive and reboot.

If all goes well you will only need to connect a usb-drive since the drivers for touch will work on the fly, if not you will need a mouse and keyboard. The drivers can be manually installed via the device manager (alot of warnings here if this is the case, solve them all by inserting a usb-drive with the drivers folder from earlier).

When this is done you will hopefully have a working istallation of windows on the tablet!

Some gripes

Screen rotation does not work for me at the moment. I solved this in windwos 10 with a file that comes with the drives, this did however make the tablet rotate the wrong way. I will look into this and post a solution if i can, please feel free to inform us if you find a solution first :).

The camera is not working for me right now, will look into this.

The tablet will automatically adjust screen brightness even if you turn this of in the power management. This is caused by the intel driver that overrides this, open the intel controll panel and disable active dimming here to solve the issue.