PLEASE KEEP IN MIND THAT THIS MAY NOT WORK.
THIS REQUIRES THAT YOUR TABLET HAVE A POGO KEYBOARD THAT DOESN'T USE A BLUETOOTH OR USB CONNECTION
BE SURE TO CREATE A RECOVERY USB DRIVE.
Here are a few things that you will need.
Two 4GB USB thumb drives.
One of these: Micro USB Adapter
and this zip file of drivers: Non-Microsoft Drivers for NextBook 10.1
The first thing I recommend that you do is create a recovery drive using the recovery drive utility in Windows 8.1; use one of the usb drives. Once that is done you will need to download the 32 bit iso of Windows 10 and then unzip onto the second thumb drive. Once that is done unzip the drivers onto the second thumb drive as well.
Once that is done you will need to go to pc settings from the side menu and choose the recovery options. Choose boot from usb drive. Once the installer has loaded you will need to do a custom install and format the install drive. It will take about 15 minutes for it to install. Once Windows 10 is installed you won't have access to your sd card, wifi, bluetooth, and touch interface among other things. Once you have logged in go to the device manager and then scroll down to where you see I2c controller, it should have a warning triangle on it. Right click on it and choose update driver and then browse for driver. Point the update manager to the usb drive and it will find the driver. There will be several unknown devices that you will need to do the same with. Once you have updated all of them you will have full access to everything again.