a. Prepare a USB flash disk with FAT32 file system, and change the volume label to WINPE.
b. Decompression the ISO of Windows10 into the root path of your USB flash disk.
(And also, you can use Microsoft’s Media Creation Tool to create an installation USB flash disk, or use a third-party tool to create a bootable Win10 USB flash disk, such as UltraISO.)
c. Plug the USB flash disk into Mini PC, and connect a keyboard to Mini PC.
d. Press the power button and press F7 or Delete continuously to enter select boot device menu --> select your USB flash disk and press Enter.
e. Input the product key.
f. Select the Hard disk which is going to install Windows.
g. Mini PC will restart after the installation finished.
h. Install drives for your Mini PC.