I guess this is off-topic and we cannot learn anything about the permissibility of mformat -k from Windows?
Michael Schierl already explained everything, but still: I reinstate the Windows 10 USB installation medium’s content. On Sat, May 11, 2019 at 07:31:23PM +0200, Thomas Schmitt wrote: > > I do not know how to verify on Windows if the boot used UEFI. > > You could zeroize the x86 machine code in the MBR: > > dd if=/dev/zero bs=1 count=446 of=/dev/sdb > After this dd it still boots. > Then BIOS/CSM legacy mode should not have anything to start with. > (It would be interesting to know whether there is useful machine code > in the MBR at all.) > > Similarly you could rename the efi/boot directory in order to hide the > EFI start-up programs and thus to prevent EFI booting. > > Renaming bootx64.efi to bootx64.efi.bkup makes the Windows 10 install medium no longer appear in the boot device selection menu. Regards, Florian _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
