I am using Rufus to write it as an MBR partition scheme. File system is all being done in FAT32. There is nothing NTFS about the image.

I tried a few options with no success.Disabling fast bootChanging secure boot settings does not net me any change and it appears you can't just directly disable it. I also don't see any option for CSM so I have no clue what I could be missing.

I am not able to figure out a way to boot memtest from a USB that I mounted with their tool and Rufus. Just no way to even boot override from BIOS