NTLDR missing on USB boot

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  1. Posts : 62
    Win10
       #1

    NTLDR missing on USB boot


    Why is it when I try to install Win 10 from a boot USB onto an old desktop which currently runs XP SP3, I get an error "NTLDR is missing" ? (Yes, I set the boot order to USB first).

    The target machine has an ALiveNF6G-DVI mobo with legacy BIOS at v2.2

    The bootable USB stick was prepared on my UEFI desktop using MS media creation tool. 64 bit option selected. I tested it there and it boots fine.
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  2. WOT
    Posts : 471
    Win 10 Pro 15063.332 (ex-Insider)
       #2

    keithjr said:
    The target machine has an ALiveNF6G-DVI mobo with legacy BIOS at v2.2

    The bootable USB stick was prepared on my UEFI desktop using MS media creation tool. 64 bit option selected. I tested it there and it boots fine.
    You may have to set the BIOS in the target machine to UEFI defaults and then try to boot from that USB drive. See post #5.
    Last edited by WOT; 30 Apr 2017 at 03:24.
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  3. Posts : 62
    Win10
    Thread Starter
       #3

    WOT said:
    You may have to set the BIOS in the target machine to UEFI defaults and then try to boot from that USB drive.
    I dont remember seeing that option in the target machines BIOS. Will have another look. I suppose if it cant be set to UEFI then I need to build the boot media using the target machine?
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  4. WOT
    Posts : 471
    Win 10 Pro 15063.332 (ex-Insider)
       #4

    I looked at your BIOS and it does have a UEFI option:

    Note from link below:
    Please update to the latest BIOS with Instant Flash or Internet Flash in the UEFI setup if you are using Windows 10.
    See post #5.

    http://www.asrock.com/mb/nvidia/alivenf6g-dvi/#BIOS

    And yes, if you want to stay with the legacy option, it would be more appropriate to create the boot media directly on the target machine so it will boot as Legacy.

    Good luck,

    WOT
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  5. WOT
    Posts : 471
    Win 10 Pro 15063.332 (ex-Insider)
       #5

    UPDATE: I looked at your owner's manual and I agree that you do not have UEFI capabilities. Moreover, your latest BIOS is from 2007 so I don't know how they could have issued such an advisory:

    Please update to the latest BIOS with Instant Flash or Internet Flash in the UEFI setup if you are using Windows 10.

    Actually, I think that is/was just intended to be a global advisory and does not apply to your specific BIOS. With that said, I would simply just create the media on the target machine (as you had suggested).

    Good luck,

    WOT
      My Computers


  6. Posts : 62
    Win10
    Thread Starter
       #6

    WOT said:
    UPDATE: I looked at your owner's manual and I agree that you do not have UEFI capabilities. Moreover, your latest BIOS is from 2007 so I don't know how they could have issued such an advisory:

    Please update to the latest BIOS with Instant Flash or Internet Flash in the UEFI setup if you are using Windows 10.

    Actually, I think that is/was just intended to be a global advisory and does not apply to your specific BIOS. With that said, I would simply just create the media on the target machine (as you had suggested).

    Good luck,

    WOT
    Using the XP machine to create the usb media, it told me that the media creation tool was not supported - I should go to a Win 7/8 or 10 machine (Going round in circles!).

    So what I have managed to do is download the Win 10 iso on the XP machine and now need to make this into a bootable USB. Can I do it so that it will work with both BIOS/UEFI setups?
    Last edited by keithjr; 01 May 2017 at 05:34.
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  7. Posts : 13,934
    Windows 10 Pro X64 21H1 19043.1503
       #7

    I use Rufus for this and select MBR partition scheme for BIOS and UEFI.

    I'm sure some folks will chime in with ways to do this without Rufus too.
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  8. Posts : 62
    Win10
    Thread Starter
       #8

    Ztruker said:
    I use Rufus for this and select MBR partition scheme for BIOS and UEFI.

    I'm sure some folks will chime in with ways to do this without Rufus too.
    I downloaded Rufus and selected MBR partition scheme for BIOS or UEFI-CSM. Created a new boot usb. However I find it still will not boot, giving NTLDR missing error. Any clues?
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  9. Posts : 13,934
    Windows 10 Pro X64 21H1 19043.1503
       #9

    Is your older PC capable of booting from USB? Are you using the F8 key to select the USB flash drive as the boot device?
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  10. Posts : 62
    Win10
    Thread Starter
       #10

    I'm entering BIOS using f2 at powerup, then setting boot order.

    I have just discovered there are issues with NTFS large files on XP USB, done some tweaks and hoping for better result. Watch this space!

    mmmm - no improvement
    Last edited by keithjr; 01 May 2017 at 15:17.
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