How To Repair Master Boot Record In Windows 7/8/10 – Without CD


Error: The boot selection failed because a required device is inaccessible.

IMPORTANT: If bootrec/fixboot comes back with “Access Denied”, try typing in bootsect/nt60 sys then type the bootrec /fixboot

This tutorial will show you how to fix, reset and repair the master boot record in Windows 7, Windows 8 and Windows 10. If you have boot errors and are having issues booting into Windows, there is a good chance the problem is stemming from the MBR. As I state in the video, as long as you can make it into Safe Mode with Command Prompt functionality, you can follow along with this tutorial.

You might receive the following error alert:

Windows Boot Manager
Windows failed to start. A recent hardware of software change might be the cause.
Status: 0xc000000e
Info: The boot selection failed because a required device is inaccessible.

This tutorial will apply for computers, laptops, desktops,and tablets running the Windows 10, Windows 8/8.1, Windows 7 operating systems.Works for all major computer manufactures (Dell, HP, Acer, Asus, Toshiba, Lenovo, Samsung).



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  2. My main hard drive died, I disconnected it and connected a different one as the main drive, I did a clean, format, and clean install of windows 7 on my drive. I partitioned it into three partitions since this drive is a terrabyte large. Then I tried to update with windows 10, and it gave me an error saying my windows/system32/ntoskrnl.exe is either missing or corrupt and would not let me exit with the options of f8 or to try again…I know it probably has something to do with the master boot, but it does boot up fine to windows and I checked the bios since I did that first before installing the windows 7 OS, and that looks fine in the bios so it is not that…some suggested it was the keyboard, but I tried that, still wouldn't boot up Windows 10, still gave me the same error. Would doing this in the boot fix that or do I need to do something else to get it to boot up the windows installation disk?

  3. i follow all the steps and after i write “attrib c:bootbcd -h -r -s its say “path not found C:boot” what should i do ?

  4. "You need to sign in as administrator to continue, but there aren't any administrator accounts on this PC."

    PC cannot boot properly. Automatic repair fail loop.

    Any work around for windows 8?

  5. You fixed my computer from an infinity boot loop thank you I was trying to update my computer and I turn my computer on purpose not thinking about the consequences and ended up with UNDOING CHANGES MADE TO YOUR COMPUTER loop and it didnt do Anything it would turn off and on every 10-20 min repeating it self so I tryed your method and it worked I honestly need to create a backup drive in case it happens again we need more people like you best of luck to your channel!!

  6. what if the error code was 0xc000000f??? what do i do??… or that what if after entering bcdedit /export c:bcdbackup ,,, it says this "the volume for a file has been externally altered so that the opened file is no longer valid"??? wtf do i freakin do??

  7. Hello! I had to use the bootsect command and all other commands were successful, except: the /rebuildbcd returned "windows installations: 0". i guess my Windows 10 is hosed? any suggestions besides re-installing Windows 10 and wiping everything?

  8. When I type in bcdedit /export c:bcdbackup I get an error that says
    The system has attempted to load or restore a file into the registry, but the specified file is not in a registry file format

  9. bcdedit … command results in The store export operation has failed. The requested system device cannot be found. Any idea?


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