When I install Windows from my usb drive. It will automatically create a OEM partition, a EFI parition, a system reserved paririon and windows 10 OS partition. AFAIK, if you use your own media driver to install windows 10, OEM partition is completely useless.
Questions:
1. Why windows 10 create OEM in the first place?
2. How can I install Windows 10 without OEM partition?