How to Fix EFI Boot Partition on Windows 10

Did you try to dual-boot your Windows 10 system with a Linux distro and you lost your EFI partition?

In this tutorial, you will learn the ultimate fix to repair the EFI partition and gain your Windows 10 boot back.

Let’s dive in!

Fix EFI Partition Like a Boss Using Windows 10 USB Drive

1. Create Your Windows 10 Bootable USB Drive

For this tutorial, we are going to need a bootable USB drive with Windows 10 in it.

If you don’t have the ISO of Windows 10, you can get it legally for free by following this tutorial: Download The Official Windows 10 ISO Legally

After you download your ISO of Windows 10 burn it into your USB drive using Rufus by following this tutorial: How to Create a Bootable USB Drive of Windows 10

Now you will need to boot into your USB drive, the key to access your boot devices is different for each manufacturer.

Just google “your PC’s brand” + “boot usb drive” and you will find the key to boot into your Windows 10 USB drive.

Now that you have known how to create a bootable Windows 10 USB drive and you know how to boot into it let’s get started.

2. Fix EFI Partition

When you boot to your USB drive you will be asked to press a key, press any key to boot from the USB drive.

Choose the keyboard language/layout and click “Next“.

Click on “Repair your computer“.

Click on “Troubleshoot“.

Click on “Command Prompt“.

Click on your user account.

Enter the password if any, click “Continue“.

Now to find the System partition which has the EFI boot files in it.

To do this execute the following commands:

diskpart
list disk
select disk 0
list partition

Now we need to assign a letter for the EFI partition to manipulate it using other tools and to fix its boot records.

Do these commands, change number “1” to the System partition number, leave the letter as “S” as it’s simple to understand.

select partition 1
assign letter=S
exit

Now we need to check the content of the EFI partition, then we will be formatting it.

Do these commands:

s:
dir
format S: /FS:FAT32
Y
Y
System

Now we need to find the letter of the Windows partition, for this we are going to use diskpart again:

diskpart
list volume
exit

The Windows partition is usually the largest, having the NTFS file system and is usually either D or C.

Now let’s check the content of the Windows partition and link it with the EFI partition.

Do the following commands (keep note S: is the EFI partition and C: in my case is the Windows partition):

c:
dir
bcdboot c:\windows /s s: /f UEFI
s:
dir
exit

Click “Continue” (Exit and continue to Windows 10)

Our system boots perfectly again! Thanks to Easytutorial.com!!

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If you have any questions about Windows 10 and partitions don’t forget to leave a comment.