Windows 10: Accidentally deleted EFI System partition. Computer says "No bootable device insert boot...

I have Windows 10 on a USB. I was wondering what I can do to recreate the EFI system partition. All of my data is still intact on the system except the EFI system partition. I tried to boot from the Windows 10 USB but it gives me a blue screen with error 0xC000000F.

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Accidentally deleted Windows 10 boot partition. How do I restore it?

Hi.

You can create a lost/deleted EFI partition by CMD.

1) Create an installation media

2) Boot PC with an installation media

3) Press SHFIT + F10 on the first screen to bring up Command Prompt

4) Run the following commands and click Enter each time at Command Prompt:

diskpart

list disk

select disk N (N refers to the disk which contains the deleted the EFI System partition)

list partition

create partition efi

format quick fs=fat32

list partition

list volume (find the volume letter which belongs to the installed Windows OS)

exit (exit diskpart)

bcdboot M:\windows (M refers to the volume letter of installed Windows OS)

(bcdboot m:\windows command will copy the boot files from Windows partition to the EFI system partition and create BCD store in the partition)

Next remove installation drive and restart your computer

Let me know if you have any questions

 

EFI SYSTEM PARTITION DELETE

Hi Jasbir,

Thank you for being part of Windows 10.

The EFI System partition (ESP) is a partition on a data storage device (usually a hard disk drive or solid-state drive) that is used by computers adhering to the Unified Extensible Firmware Interface (UEFI). When a
computer is powered up and booted, UEFI firmware loads files stored on the ESP to start installed operating systems and various utilities. An ESP needs to be formatted with a file system whose specification is based on the FAT file system and maintained as
part of the UEFI specification; therefore, the file system specification is independent from the original FAT specification.

ESP contains the boot loader programs for all installed operating systems (which are contained in other partitions on the same or other storage device), device driver files for devices present in a computer that are used by the firmware at boot time,
system utility programs that are intended to be run before an operating system is booted, and data files such as error logs.

So I would request you to not delete those partitions.

Do get back to us for any issues pertaining to Windows in the future. We will be happy to help.

 

EFI partition delete issues and restoration

If I delete the EFI partition accidentally in Windows 10, how do I setup or manage or restore the EFI partition?