You can try the following, but backup your data, it shouldn’t but can kill your partitions so you need to reinstall windows and android.
Also I am not responsible if there is any damage.
Download the dual flash image from techtablet (Download -> Pipo -> Pipo W3f -> <span class=”cat”>Dual Boot Bios Android Rom & Win8.1 Image)</span> Download all Packages and extract them.
Copy the files in android(2) onto your sd card.
Download this .zip (http://www.file-upload.net/download-11040827/Desktop.zip.html)
and replace the files onto your sd card.
Connect Keyboard go into bios Head to Save & Exit bios menu and then Launch EFI Shell from filesystem device.
What does this files do?
It should boot the cwm recovery from another Bay Trail Tablet so it also should work on this one. If it works you can install a .zip file in cwm which can be the supersu package for root (https://download.chainfire.eu/696/SuperSU/UPDATE-SuperSU-v2.46.zip)
Would be nice if you come back and report because I am planning to buy the tablet but without root I can also not use it.