Linux?

Let’s just call it Ubuntu LTS and how to install:

Two drives are needed for better speed.

First install Windows on second drive after disabling primary drive.

Than install Linux on first drive and disable second drive.

After successful boot of Linux, enable second drive. 

You can do both installs under UEFI, but than disable it and set it to CSM.

Do “sudo update-grub” or do updates to add Windows Boot Loader to grub.