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I want to dualboot window 8 Pro and ubuntu.It can't boot ubuntu in first time,then i use easyBCD to change window boot Manager to boot ubuntu.I add Entries and Install NeoGrub.when I restart on Windows Boot Manager screen it has only "NeroGrub Bootloader" that I can choose.window 8 is disappeared ,then I use ubuntu "trying ubuntu mode" and use Boot-repair to repair grub.it 's work and return this : http://paste.ubuntu.com/6655010/ ,Now I can boot to my ubuntu,but window can't.on grub boot list I have

  • Ubuntu, with Linux 3.5.0-23-generic
  • Ubuntu, with Linux 3.5.0-23-generic(recover mode)
  • Windows UEFI bkpbootmgfw.efi
  • Window Boot UEFI loader
  • efi/EFI/Boot/bkpbootx64.efi
  • Window 8 (loader) (on /dev/sda4)

when I choose "Windows UEFI bkpbootmgfw.efi" or "Window Boot UEFI loader",it's go to Window Boot Manager screen and has only one choice "NeoGrub Bootloader".When i choose It's show error like

Window failed to start. A recent hardware or software change might be cause. To fix the problem: . . more details . file: \NST\NeoGrub.mbr status: 0xc000000f Info: The application or operating system couldn't be loaded ...

Help me please! I stuck with this problem for a week. Thankyou very much for all answer,Sorry for my weak skill grammar. Tell me if you want more information or don't understand my question.

DrNutsu
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1 Answers1

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You need to repair your windows bootloader and then make grub2 as default bootloader.To do that follow the below steps,

  • Boot windows installation disk then select the "windows repair" or "repair your computer" option before you go into the installation process.

  • After selecting windows repair option,it will take you to the next screen.In that screen select the "command prompt" option

  • Then run the below commands,on it.

    bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

  • This will repair your windows bootloader.

  • Atlast ran boot-repair-disk and click on the recommended repair option.Now it works.

Avinash Raj
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  • thanks a lots for your answer. I follow your suggest,it's success except,when i type "bootrec /rebuildbcd" and it's show "[1] C:\Windows" was found,and I type 'Y' for submit it.it's return "The request system device cannot be found".and when I restart it's not work. – DrNutsu Dec 29 '13 at 08:55
  • after that try boot-repair. – Avinash Raj Dec 29 '13 at 08:57
  • ok,I tried on ubuntu boot form Grub.it's not work.it's has same problem.it's boot to Window Boot manager and has only one NeoGrub,and when i choose Window 8 (loader) it's show "error" unknown command 'drivemap' " and "invalid EFI file path.". result form boot-repair : http://paste.ubuntu.com/6655941 – DrNutsu Dec 29 '13 at 09:28