Then make a .imgPTN file from the Windows 8.1/10 Installer ISO using the Easy2Boot MPI Tool Kit (just drag-and-drop the ISO onto the MPI_FAT32 Desktop shortcut).
Then boot from the Easy2Boot drive, choose the Windows .imgPTN file and then choose the Clover boot option in the CSM menu to boot to Windows Setup and install Windows in UEFI-mode.
If you find that your system will not run Clover (e.g. cursor at top of blank screen only, be patient, it may take several minutes to load Clover!), then I suggest you put the 3TB hard disk into a different system that will run Clover or that does support UEFI-booting.
Do not activate Windows using a Product Key when on a different system or it will lock the Product Key to that system!
Windows 8/10 is very good about booting from a different system, so once you have complete the instructions below, you can put the 3TB hard disk into the MBR-only system. Then you can install any extra drivers, etc. and activate Windows with the correct Product Key.
Tip: If Setup refuses to install to the hard disk, you may need to run Diskpart in the command console (SHIFT+F10) and use 'clean' and 'convert GPT' before you select the drive and start the installation.
Type these commands to erase the first hard disk and then continue running Windows Setup...
select disk 0
UEFI-boot using Clover again: choose 'Boot Microsoft EFI boot menu from EFI' to boot to Windows and complete the installation.
2. Once Windows is installer, at this point, you could choose to always boot from USB and boot in UEFI-mode using Clover (recommended)
This would avoid the problem of Windows Updates and Hibernation not working.
However, there may still be other issues (such as Windows Recovery not working).
You can keep a small cheap USB drive plugged into a USB port on the system permanently and set the BIOS to always boot from it first.
To make a new USB boot drive, copy these files and folders from the E2B drive (keep same folder structure)