From your message it is not clear if you want to have Android and Windows or Windows only I tested Android on this tablet for a few days and saw no real value in having it so I deleted everything and installed Windows only. Create a Windows 10 install pen-drive with the Microsoft Media creation tool, connect a USB hub, connect a USB keyboard, USB mouse and the pen-drive. Boot, press F7 to get boot menu, chose to boot from the pen-drive Launch Windows install, during the install process delete all partitions and install Windows normally You’ll end up with a 58 GB partition with Windows taking about 11 GB and the rest free.
I am sorry, is my English, I am looking to leave it as factory (WINDOWS + Android), but will not let me install windows and do not know how to install android to try. Thank you very much for your reponse!