Windows 10: linux grub bootloader failed after win 10 updates

  1.    29 Nov 2015 #1

    linux grub bootloader failed after win 10 updates


    My son (26) just returned a long term loan P8B67B Deluxe to me with Linux and Win 7 on it. I upgraded 7 successfully, but after updates installed last night the PC refuses to boot saying "error, no such partition, Entering rescue mode .. grub rescue>" Repeated boot attempts saw it fall into error 53 on the mobo lcd display. Removing one ram stick brought me back to booting to "error, no such partition, Entering rescue mode .. grub rescue>"

    Trying to boot just one HDD either gives the above message, or "error, no such device : 521683dd-0417-4a66-b3fb-c6c67b9cc9fo grub rescue>"

    I don't need the linux. That was my engineer son. What fixes are there to bring it to Win 10 alone? I don't know the new key or the old 7 key. Should have checked and written it down
      My ComputerSystem Spec

  2.    30 Nov 2015 #2

    I tried:

    grub rescue>set boot=(hd0,msdos6)
    grub rescue>set prefix=(hd0,msdos6)/boot/grub
    grub rescue>insmod normal
    error: no such partition.
    grub rescue>

    ls
    (hd0) (hd0,msdos1)
    grub rescue>set boot=(hd0,msdos1)
    grub rescue>set prefix=(hd0,msdos1)/boot/grub
    grub rescue>insmod normal
    error: unknown filesystem.
    grub rescue>

    grub rescue>set boot=(hd0)
    grub rescue>set prefix=(hd0)/boot/grub
    grub rescue>insmod normal
    error: no such partition.
    grub rescue>

    My limited linux knowledge got me nowhere there.

    Now downloading a 64 bit Windows 10 N iso through media creation tool to try a boot repair for Windows.

    Burnt a disk, went to repair/Advanced Options/Command Prompt
    Tried:

    • bootrec /RebuildBcd
    • bootrec /fixMbr
    • bootrec /fixboot
    • Exit

    At Rebuild Bcd it only found Windows.old
    Last edited by alancsalt; 30 Nov 2015 at 03:36.
      My ComputerSystem Spec

  3.    30 Nov 2015 #3

    Code:
    bcdboot C:\Windows
    Try running that at the command prompt to recreate the boot files. That's assuming your Windows installation is located on the C: drive. If another drive just change the letter.
      My ComputerSystem Spec

  4.    30 Nov 2015 #4

    Well, final workaround was installing Win 10 N intending to use the Win 7 N key. My son found the key. I installed an iso I got from the Media Creation tool earlier, and deferred putting in the key, wanting to wait till net connected. There were two key prompts during installation. When it finished I needed no other drivers, everything was up and running, and here's a kicker. Windows 10 N was activated and had a key already????

    While I've kept the original hard drive, exploration showed that all the personal files that should have gone from windows.old default user to windows default user no longer existed. I think more than just the boot loader is damaged. 2:05AM here now. Sometime tomorrow I'll shift whatever useful files I can find over to the fresh instal. After that I may try your suggestion just to see.
      My ComputerSystem Spec


 

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