I recently just built my PC and got to the bios for the first time on the MSI gaming 5. I already made my ISO from a usb file and do see it under the bootable options in the bios. Now when I created the bootable usb, I made it so my Windows 7 ISO would boot from legacy, however I see two options under the boot options for my USB ISO. One of them reads UEFI USB Key:UEFI: (NTFS) PNY USB 2.0 FD 1100. The other reads the same except without the UEFI wording and without (NTFS). Which should I use if I'm wanting to boot windows with legacy? I should also note that my "Boot mode select" is with LEGACY+UEFI.