How to install Windows 10 on iMac 27 4K latest version?

Question

Windows

I'm trying to install a clean windows 10 pro image on iMac 27 4K latest version (September 2017 release) from a flash drive without Bootcamp utility. Using unetbootin, I wrote the image to a USB flash drive. After the reboot, it started from a USB flash drive, I start the installation, but when copying files, the error immediately pops up “Windows could not prepare the computer to boot and go to the next. installation phase. To install Windows, run the installation again." Every time I try, it doesn't help. Tried other images too. The result is the same. What could be the problem?
The iMac has a 512gb SSD.
Windows 10 pro x64 image.

Answer 1

without Bootcamp
, restore the macos in any way (thankfully, an Internet connection is enough for this)
make a USB flash drive in Bootcamp and you will be happy