Which tool to recover the EFI partition? Booted into Rescue Disk

More on this. Which partition should I assign the letter W:?

I see 4 partitions:

Partition 1: System 300 MB
Partition 2: Reserved 128 MB
Partition 3: Primary 808 GB
Partition 4: Recovery 909 MB



Select Partition X

Either case you will not lose any personal data but your computer still remains unbootable.
Assign System partition W: letter.
Execute List Volume command to see all drive letters.

In this video, he picks the "System" partition which in my case would be Partition 1, so that is what needs to be assigned letter "W:", correct?

Yes correct.

FreeBooter said:

Execute below command:

Code:

bcdboot C:\Windows /s W: /f  ALL

I assigned the letter and ran this command above.

However, when I run bcdedit, I still get the same error message:

The boot configuration data store could not be opened.
The requested system device cannot be identified due to multiple indistinguishable devices potentially matching the identification criteria.

Yes execute the bcdboot command but execute List Volume to see C: drive letter is assign to Windows 10 install partition.

FreeBooter said:

Yes execute the bcdboot command but execute List Volume to see C: drive letter is assign to Windows 10 install partition.

that is correct. That is what it shows. C is OS_INSTALL and W: is SYSTEM FAT32 300MB HEALTHY

I ran bcdboot.

It should have fixed bcdedit, which should should now the boot devices and stuff.

Since the BCD store exists and lists a Windows installation, you'll first have to "remove" it manually and then try to rebuild it again.

At the Command Prompt, type below command as shown and then press Enter:

Code:

C:

At the Command Prompt, type below command as shown and then press Enter:

Code:

bcdedit /export C:\bcdbackup

The bcdedit command is used here to export the BCD store as a file: bcdbackup. There's no need to specify a file extension.

The command should return the following on screen:
The operation completed successfully.

Meaning the BCD export worked as expected.


At this point, you need to adjust several file attributes for the BCD store so you can manipulate it. At the prompt, execute the attrib command exactly like this:

Code:

attrib c:\boot\bcd -h -r -s

What you just did with the attrib command was remove the hidden, read-only, and system attributes from the file bcd. Those attributes restricted the actions you could take on the file. Now that they're gone, you can manipulate the file more freely - specifically, rename it.

To rename the BCD store, execute the ren command as shown:

Code:

ren C:\boot\bcd   bcd.old

Now that the BCD store is renamed, you should now be able to successfully rebuild it.

Try rebuilding the BCD again by executing the following, followed by Enter:

Code:

bootrec /scanos
bootrec /rebuildbcd

Restart your computer after rebuilding the BCD store.

Have you restart your computer after executing bcdboot command?