Bootmgr Missing Error From Usb Windows 7 ISO?

My computer recently began to give me bsod and would not detect external devices, i.e. external hard drives, wireless adapters, and other usb devices. The issue windows gave me as the cause was that these devices did not have digital signatures. After online research and a trip to the geek squad, I determined that all of my hardware was in perfect working order. I tried to remove and re-install my copy of windows 7 64 bit ultimate but found that my disk was, despite being unscathed, unreadable and unusable.

I found several articles about creating a bootable USB drive with an ISO of the disk. I have the ISO on my laptop and have been trying to get my USB to operate on the desktop, which due to blue screens and automatic restarts gave me no recourse but to wipe it completely. As I stand now I have partitioned the USB drive as fat32 after doing a cmd prompt cleaning and have loaded the iso on using several different programs including the official Microsoft USB creator. All but one have produced the same error saying "error loading operating system" when booting from just the USB. The only program to produce a different result was YUMI which loaded a program that launches on start up and gives me the option to use the Windows 7 ISO but then produces another error saying "Error 27: Unrecognized Command"

Have I missed something in the formatting process or does the fact that the Windows USB creator re formats the USB as NTFS before every ISO upload mean that I cannot load my copy of Windows 7 this way?