The FOG exit mode is set to GRUB. The computers are both set to Legacy Boot in the boot options, with the only thing on the boot sequence being NIC, then Harddisk. They are both set to AHCI. When I click on UEFI in the BIOS settings of either computer - there are no boot order options at all.
Laptop: Latitude E6520 Windows 7 Pro
Legacy Boot
NIC, then HD
AHCI
Desktop: OptiPlex 990 Windows 7 Ent
Legacy Boot
NIC, then HD
AHCI
After iPXE closes both computers launch a GRUB screen(if they have a usb flashdrive in) that I have attached a picture of.