However, Windows and UEFI standards have moved away from legacy booting with MBR partitioning. UNLESS you enable CSM for legacy booting, as described in the link. Reboot > click Use recovery tools that can help fix problems starting Windows when you disc loaded> Windows installation > Command Prompt. Define boot order: make boot form CD/DVD as the first option > Save > Exit. Non-UEFI bootable devices will still show up as AHCI-controlled devices, they just won't be bootable. Steps to format a computer using command prompt in BIOS. In my experience, UEFI BIOS will use these to identify what is UEFI-bootable and place them in the boot list.
They will have an EFI System partition containing the directory \EFI\BOOT\boot圆4.efi for removable devices like a USB drive or DVD, and for the Windows SSD it would be \EFI\Microsoft\Boot\Bootmgfw.efi. In Native UEFI boot mode with GPT partitioning scheme (as opposed to legacy BIOS boot mode with MBR partitioning scheme) the only SSD, HD and USB drives that show up in the boot list are the ones that have Windows or other OS installed in UEFI mode. Hello, your question reminds me of a similar issue I had, at least I think the issue is similar.
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