Creating the Windows 10 on ARM UTM Template / .utm file

Creating the Windows 10 on ARM UTM Template / .utm file

Create a new VM.
Information:
Change the name to Windows 10 on ARM. You can choose the icon style "Operating System" and change it to the Windows logo for bonus points.
System:
* Architecture: ARM64 (Aarch64)
* System: virt-5.2
* Memory: 1024 MB (or more, depending on your device. 1024 is the minimum for Windows 10)
* Show Advanced Settings: On
* CPU: cortex-a57
* CPU Cores: 4 Cores
* Force Multicore: On
* JIT Cache: 512 MB (optional, but speeds up the virtual system)
* QEMU Machine Properties: "highmem=off,virtualization=on"
* Boot Order: CD/DVD
QEMU: we will come back to this section after we have finished all other sections. Please keep reading.

Drives:
1. Import Drive "QEMU_EFI-AARCH64-XXX-UTM-logo.fd".
Image Type: BIOS
2. Create Drive
Removable: Off
Interface: VirtIO
Size: at least 20 GB
3. Create Drive
Removable: On
Interface: USB
4. Tap on the removable drive you just created. Change its Interface to None (Advanced).
The reason why we're doing this is to then manually connect the drive to a USB 2 port on the VM. By default, UTM connects the drive to a USB 3 port, and Windows 10 installer seems to forget that that one exists halfway through the install - no good!

Display:
* Type: Full Graphics
* Emulated Display Card: ramfb (not virtio-ramfb!)


QEMU: (after finishing Drives section)
Scroll all the way down and add the following lines.
-device usb-ehci,id=ehci
-device usb-storage,removable=true,bus=ehci.0,drive=drive2
Double check that further up (greyed out section), there is a line similar to this:
-drive if=none,media=cdrom,id=drive2
If the number in "drive2" is different for you, change the "2" at the end of the second line above to this number.