Dual Boot, Error Code:0xc000000f

  1. Posts : 23
    Windows 10 Home (x64) Version 2004 (build 19041.572)

    Dual Boot, Error Code:0xc000000f

    Firstly may I apologise if I have submitted my problem in the incorrect Forum, my symptoms seem to spread across a couple of areas.
    I am operating a 1 TB drive with Windows 10 and 7 in a Dual Boot configuration on my desktop PC, the win 10 is an on-line downloaded upgrade from win 8.1, which was also an on-line download. All as been running well since win 10 was launched. I use win 10 for my Admin and Image Storage and manipulation and Win 7 for Flight Sim.
    Yesterday afternoon I restarted my PC from Win 7, the PC rebooted to the Win 10 sign on screen but it was in a frozen state, there was nothing I could do so I pressed the PC reset button. It did not reboot to the Dual Boot screen, but presented me with a Blue screen headed 'Your PC needs to be repaired' followed by reference to:
    File:\windows\system32\winload.exe. , and then the error code indicated in the Thread Title above, and the following.
    You'll need to use recovery tools on your installation media. If you don't have any installation media (like a disc or USB device) contact your administrator or PC manufacturer.
    I don't wish to muddy the waters any, but coincidentally I had a Windows update during the morning when first booting up?I searched the internet for a solution and came across the media creation tool which I downloaded to a USB and attempted to reboot the PC, nothing happened. I am now unable to reboot the PC by any means, this is complicated by the fact that both win 8.1 and Win 10 were downloaded installs and there are no system discs? I would appreciate your valued assistance on this issue and as I said earlier apologise for any inconvenience if this is in the incorrect Forum.
      My Computer

  2. Posts : 384
    Windows 10 Home x64

    You can download the ISO of Windows 10 from here on another PC;


    Please make sure you have the 4GB USB Drive or DVD-R before you begin.
      My Computers

  3. Posts : 13,676

    Hopefully it is just screwed up boot sectors.

    On another pc, install Macrium Reflect Free and create a Macrium Rescue Drive.

    Boot from Rescue Drive, and select Restore tab.

    Click 'fix windows boot problems'

    With a bit of luck, it will list both OSs. If you do not see both, you willnhave a different problem.

    Select one of them as default (can change later).

    Then click next, finish and it will rebuild boot sectors.

    After this, if 10 is broken, you can clean install, overwriting broken version.
      My Computer

  4. Posts : 23
    Windows 10 Home (x64) Version 2004 (build 19041.572)
    Thread Starter

    Dual Boot, Error Code:0xc000000f

    Thanks for your note.
    As the issue was urgent I went onto an alternative Forum site for advice. During the exchange of messages, I came to realise that an old drive I was using for storage also had an partition for 'system reserved' which I assume was an old OS system, I deleted this partition and the problem seems to be resolved? however, I am looking now to separately clone both partitions and to copy into 2 drives, I will come back soon and let you know if all is OK thanks for your assistance anyway.,
      My Computer


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