Tuesday 17 October 2017

linux - fix windows 8 efi MBR - no success


I have deleted the windows efi partition ( not windows ).I have in my system 2 linux distro and 2 efi partitions.


I am trying to fix windows boot following steps like:


here and here.


The problem is , that when I enter the command:


bootrec /fixboot

it shows :



The system cannot find the file specified



I tried to run :



bootrec /rebuildbcd



,so it shows:



Successfully scanned Windows C:\Windows Add installation to boot list?



I answer "Yes" and then it again throws me the previous message.


What can I do about that?


(The "This question may already have an answer here" doesn't help since the /fixboot doesn't work..)


---- UPDATE ----


1) I tried to run : bcdboot c:\Windows and it throws:



BSFSVC Error:Failed to create a new system store



2) I typed active after assign letter = v: but it shows :



The selected disk is not a fixed MBR disk



3) I saw that in the directory : C:\Windows\Boot\EFI\ it has the files : bootmgr.efi , bootmgfw.efi


Should I try there all the commands:


bootrec /fixboot , fixmbr or I may do things worse?


------ UPDATE ---------------------


This post is different from the duplicate one , in that , when I try to run :


bootrec /fixboot , it shows: The system cannot find the file specified


I think I made this clear.Why do you duplicate this post???


--- UPDATE 2 -------------------------


I tried ( i have only 1 disk in my laptop ):


list disk
sel disk 0
list partition
sel partition 2 ( it is an efi partition I have created when I installed linux )
active -> gives message "The selected disk is not a fixed MBR disk"

I then followed the same procedure:


list vol
sel vol 11
assign letter = v:
exit

Now , when I try: bootrec /fixboot , it shows me the message "No element found"


------UPDATE 3-------------------


I upload screenshots here and here. Disk 0 is my laptop disk. Disk 1 I don't know Disk 2 is the flash drive from which I am running repair disk.


As for the partitions , the 2 and 10 are EFI partitions I generated from the linux distros. So, the volumes are 11 and 12. I tried both.


---------- UPDATE 4 ----------------------------------------------------


I tried :


 bootsect /nt60 ALL /force

but still nothing. When I enter : bootrec /fixboot ,it shows :



element not found.



Also, after this:


Successfully scanned Windows installations.
Total identified Windows installations: 1
[1] D:\Windows
Add installation to boot list? Yes/No/All:

I enter Y but I am getting a negative answer ( I don't remember what exactly! ).


The good thing though ,is that now (after updating grub) the windows boot option appeared in my grub menu. But when I select it ,it shows:



The boot configuration data file is missing required information.


File :\BCD Error Code: 0x0000034



I am not sure what to do from now on.


I saw somewhere to try : bcdboot c:\windows but I don't know how to access 'C' drive. Ok, I am doing:


sel disk 0
list vol

and in volumes I can see 'C' listed . But I don't know beyond this.


Also,I tried renaming the BCD file and then rebuild but still the same.


-----UPDATE 5--------------------------


Volume 10 contains:


Bin
Boot
Recovery -> empty
RicaTools -> bootmgr,bootmgr.efi ....
TFR
WinRePartition.ini

Volume 11:


EFI-> manjaro -> grubx64.efi
BOOT-> BOOTx64.efi
Microsoft-> Boot -> bootmgfw.efi
bootmgr.efi
boot.stl
MokManager
BCD
...

->ubuntu-> grubx64.efi,grub.cfg,shimx64.efi

Volume 12:


EFI-> mint ->grubx64.efi
manjaro-> grubx64.efi

---UPDATE 6------------------


Finally it worked thanks to Christophe!


Just want to note for anyone who has the same problem , that the last command fixboot gave



Element not found



but it didn't matter!


Of course ,finaly,I had to do an update-grub .



Answer



If you have any important data on your computer I advise you to boot on some Windows PE based CD/USB media with a GUI (Hiren's boot CD for example) and connect an external HDD to try backuping your important data.


Try to map the V: letter to the 260MB EFI partition by running the following diskpart commands:


diskpart
select volume 11
assign letter=v:
exit

Then rename the current Windows boot environment folder with the follwing command:


ren V:\EFI\Microsoft\Boot Boot.old

Re-create the Windows boot environment with bcdboot:


bcdboot C:\Windows /s V: /f UEFI

Afterwards, run bootsect which will look through your partitions, find the one with Windows 8 and update its boot code:


bootsect /nt60 ALL /force

Then re-run bootrec which this time should not output any errors :


bootrec /fixmbr

Finally, restart your computer to check if you are able to boot in Windows.


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