@CEEBEE any reason you want to particularly install the OS provided by GPD? I suggest you to perform a clean installation of the OS, by downloading the installation media from Microsoft directly. You can find the instruction here below, and follow the instruction from the section where it says “How to Get Installation Media and Do a Clean Install of Windows 10”.
Before doing that I suggest you to upgrade your BIOS to 0.24 which seems to be more stable. Be careful while upgrading to BIOS and follow the instructions carefully. DO NOT TURN OFF THE SYSTEM until the entire process completes successfully. I suggest you to walk away from notebook for 10 - 15 minutes at-least, if you are impatient.
I am assuming that once you get the USB installation drive ready, you know to boot into it from BIOS. After you install the windows download the driver package from GPD. You will find unrecognized devices in the device manager, you can right click in those devices and update the device drivers by using the downloaded package. You may need to install only Goodix driver for Touch Screen, Focaltech fingerprint reader driver.
And don’t worry about the Windows activation, it will happen automatically after installation.