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bootrec /scanos or bootrec /rebuildbcd not working

Anonymous
2019-02-24T06:57:40+00:00

I'm getting an odd issue where if I run either command, they don't run all the way through. bootrec /scanos doesn't tell me how many (if any) installations of Windows were found, and bootrec /rebuildbcd tells me it might take a while, but then quits after a few seconds with no other words.

Might be worth nothing that bootrec /fixboot returned as having denied access.

Any thoughts?

Windows for home | Windows 10 | Windows update

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  1. Anonymous
    2019-02-25T06:37:44+00:00

    Hi powerlien,

    Thank you for writing to Microsoft Community Forums.

    I understand how difficult it is, when the system doesn’t work in the way it should. For us to isolate the issue and to assist you further, we'd like to ask you a few questions.

    1. Does the computer boot to the desktop?
    2. Did you install multiple OS on your system?
    3. Why are you running those commands?

    I suggest you to create a bootable media and full the command mention below, Refer this article on How to access Windows Recovery Environment (WinRE) thru Windows 10 Media Creation Tool / DVD ISO to access WinRE Advanced options. 

    1. Click on Command Prompt.
    2. In the Command Prompt, type in or copy/paste the given below line of commands one after the other. Ensure to press/hit Enter after inserting each command. Diskpart sel disk 0 list vol
    3. Verify the EFI partition by using the FAT32 file system as well as to assign a drive letter with it. Type these commands in Command Prompt and press Enter after each of them. sel vol <number of volume> assign letter=<drive letter>: exit
    4. Repair the Boot record by running following Commands, type one at a time as well as hit the Enter button from keyboard**.** *cd /d <drive letter>:\EFI\Microsoft\Boot* bootrec /FixBoot
    5. Now you need to rebuild the BCD store again, type the command below and press Enter . ren BCD BCD.old
    6. Recreate **** it by running the given line of command**.** bcdboot c:\Windows /l en-us /s <boot letter>: All

    Hope it helps, 

    Regards,

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  2. Anonymous
    2019-02-25T06:53:01+00:00

    Hi,

    Two possible problems that I have encountered like this...

    Most of the Windows 10 versions after Windows 10 Creators  (1703) 15063 seem to have a problem with some of their command prompt commands...

    Another possibility is that the installation\repair media is not correct for the type of Bios you are using...

    Or that the proper "UEFI USB Drive" or simply "USB Drive" was not selected at boot..

    Usually if the media is properly created, it is not necessary to select it in "Boot Options", but that is somewhat dependent on the machine's Bios...

    For instance... UEFI Bios Flash Drives need to be a GPT\FAT32 type, and Legacy Bios Flash Drives need to be MBR\NTFS...

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