Sep 24, 2020 · The fact is that if Windows 10 is installed in native UEFI mode on a GPT disk, then the Windows 10 EFI bootloader (Windows Boot Manager) stores the boot manager and BCD configuration on a separate hidden EFI volume (100 MB in size with the FAT32 file system). The bcdedit tool doesn’t see this EFI partition, and cannot manage the bootloader ...