Does Windows 7 support the need UEFI replacement for BIOS? If yes, does
this require 64-bit Windows 7? Does it require the system partition and
boot partition to both be on a GPT disk?

I have a Windows 7 Ultimate 64-bit boot partition working on an old Dell
computer. That computer's BIOS says nothing about UEFI. When I try to
copy over the image of the system partition and boot partition to a a Dell
T7600 system - which DOES offer UEFI boot devices as an option - and try to
boot in legacy mode, I get a message that I am trying to boot a UEFI device
in legacy mode. Unfortunately, that device does NOT show up in the list of
boot devices. When I select the device 0 on the boot controller, I get a
message that the partition cannot be booted (without any details).

If I go into the Dell T7600 setup and configure it to use UEFI, that is more
confusion. If I try to add a UEFI device, it tells me "No file system".
If I simply enable UEFI without adding a boot device, it finds nothing on
startup.

So at the end of the day, I have an exact image copy of a bootable WIndows 7
64-bit OS, and I cannot get it to boot in either legacy mode or in UEFI
mode. Since I have no experience with UEFI, I am just lost here.

P.S., I was copying over the Windows disk image just to bootstrap install
process, and I was going to relicense the OS once it booted.

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W