Hello Michaella.
I would like to thank you for this beautiful Windows 7 ROG Rampage, but there is a problem with the file, the .iso is not bootable.
I modified the .iso file and replaced the corrupt file with a working boot file that I extracted from another working/bootable Windows 7 ISO,
If you'd like, I can send you a link to my cloud drive where you can download the Windows .iso you created with the boot file I replaced.
I hope it is of some use for you.
Kind regards
Rich.