If you already have a genuine Windows 7 x64 SP1 ISO, convert it for UEFI:
Follow on-screen instructions for a standard installation. Download Windows 7 Uefi Iso
Navigate to \sources\install.wim on the ISO and open it with 7-Zip . Go to \1\Windows\Boot\EFI\bootmgfw.efi . If you already have a genuine Windows 7
Even with a perfect "Windows 7 UEFI ISO," your PC will fight you unless you tweak the BIOS. Download Windows 7 Uefi Iso