Efi/microsoft/boot/bcd

This write-up provides information around exactly how to settle an issue via the EFI Bootloader not booting appropriately on a GPT Hard Disk Drive. It consists of instructions for various Windows Operating Solution. Summary:This write-up provides information around how to fix an issue through the EFI Bootloader not booting properly on a GPT Hard Disk Drive. It contains instructions for various Windows Operating Systems.See less This write-up offers information about just how to deal with an issue with the EFI Bootloader not booting appropriately on a GPT Hard Disk Drive. It has instructions for miscellaneous WindowsSee even more
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Symptoms

Table of Contents:


Cause

Introduction

Many people through boot worries on Windows Operating Solution (OS) select to reinstall the OS rather than effort to deal with the boot problem itself.

You watching: Efi/microsoft/boot/bcd

Thispost faces repairingthe EFI (Extensible Firmware Interface) bootloader on a GPT (GUID Partition Table) Hard Disk Drive.

This solution only functions for OSs mounted on a UEFI (Unified Extensible Firmware Interface) BIOS (Basic Input / Output System).

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Resolution

How to repair your EFI Bootloader

Windows 7, 8, and 8.1 might install on a Legacy BIOS using MBR. However before, Windows 8, 8.1, and 10 were designed to install on the UEFI BIOS utilizing the EFI bootloader and GPT.


Note: Attempting to repair the root of a tough drive may cause you to lose any information on the drive that wasnot formerly backed up. A best exercise is to always fullyearlier up a drive prior to functioning on it or its OS.

The GPT framework encounters many type of of the problems that the Bootsect command was designed to remedy in MBR. However before, if you needto repairthe EFI bootloader,follow the proper instructions below:


Windows 7

If you do have the Installation Media:

Insert the Media (DVD/USB) in your COMPUTER and also restart.

Boot from the media.

Select Repair Your Computer.

Select the operating mechanism, and also click next.

Choose Command Prompt from the menu:

Type and also run the command:

diskpart

Type and also run the command:

sel disk 0

Type and run the command:

list vol

Verify that the EFI partition (EPS - EFI System Partition) is making use of the FAT32 file system.Assign a drive letter to it that is not currently in use:

Type and run the command:

sel vol

Type and also run the command:

assign letter=:

Type and also run the command:

exit

In order to repair the boot record:

Type and also run the command:

cd /d :EFIMicrosoftBoot

Type and also run the command:

bootrec /FixBoot

If you execute not have actually the Installation Media:

Restart your PC.

Tap quickly on the essential as soon as the PC has actually turned on, however prior to the Windows Splash Display shows up.

Select Repair your computer from the menu that appears.

Select Command also Prompt from the Recoextremely Options.

Type and also run the command:

diskpart

Type and also run the command:

sel disk 0

Type and also run the command:

list vol

Verify that the EFI partition (EPS) is using the FAT32 file device and also asauthorize a drive letter to it that is not already in usage.

Type and also run the command:

sel vol

Type and also run the command:

asauthorize letter=:

Type and also run the command:

exit

In order to repair the boot record:

Type and also run the command:

cd /d :EFIMicrosoftBoot

Type and also run the command:

bootrec /FixBoot


Windows 8 and also 8.1

If you do have actually the Installation Media:

Insert the Media (DVD/USB) in your PC and also restart.

Boot from the media.

Select Repair Your Computer.

Select Troubleshoot.

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Choose Command Prompt from the menu:

Type and run the command:

diskpart

Type and also run the command:

sel disk 0

Type and also run the command:

list vol

Verify that the EFI partition (EPS - EFI System Partition) is making use of the FAT32 file mechanism. Assign a drive letter to it (Assign a letter that is not currently in usage.):

Type and run the command:

sel vol

Type and run the command:

assign letter=:

Type and run the command:

exit

In order to repair the boot record:

Type and also run the command:

cd /d :EFIMicrosoftBoot

Type and run the command:

bootrec /FixBoot

If you do not have actually the Installation Media:

Restart your PC

Tap promptly on the essential when the PC has turned on, however before the Windows Splash Display appears.

Be aware this might take a number of attempts. The timing for this choice was shortened substantially from that in Windows 7.

Select Repair your computer from the menu that shows up.

Select Command Prompt from the Troubleshoot screen:

Type and run the command:

diskpart

Type and run the command:

sel disk 0

Type and run the command:

list vol

Verify that the EFI partition (EPS) is utilizing the FAT32 file system. Asauthorize a drive letter to it (Assign a letter that is not currently in usage.):

Type and run the command:

sel vol

Type and run the command:

assign letter=:

Type and also run the command:

exit

In order to repair the boot record:

Type and run the command:

cd /d :EFIMicrosoftBoot

Type and run the command:

bootrec /FixBoot


Windows 10

If you do have the Installation Media:

Insert the Media (DVD/USB) in your COMPUTER and restart.

Boot from the media.

Select Repair Your Computer.

Select Troubleshoot.

Select Modern Options.

Choose Command also Prompt from the menu:

Type and run the command:

diskpart

Type and also run the command:

sel disk 0

Type and run the command:

list vol

Verify that the EFI partition (EPS - EFI System Partition) is making use of the FAT32 file mechanism. Assign a drive letter to it that is not currently in use.):

Type and also run the command:

sel vol

Type and run the command:

assign letter=:

Type and run the command:

exit

In order to repair the boot record:

Type and also run the command:

cd /d :EFIMicrosoftBoot

Type and also run the command:

bootrec /FixBoot

If you carry out not have actually the Installation Media:

Restart your PC

Tap quickly on the crucial once the PC has turned on, however prior to the Windows Splash Display shows up.

Be conscious this might take a number of attempts. The timing for this option was shortened considerably from that in Windows 7.

Select Repair your computer from the menu that appears.

Select Command Prompt from the Advanced Options tab in the Troubleshoot screen:

Type and also run the command:

diskpart

Type and also run the command:

sel disk 0

Type and also run the command:

list vol

Verify that the EFI partition (EPS) is utilizing the FAT32 file mechanism and also assign a drive letter to it that is not already in use:

Type and also run the command:

sel vol

Type and also run the command:

assign letter=:

Type and also run the command:

exit

In order to repair the boot record:

Type and also run the command:

cd /d :EFIMicrosoftBoot

Type and also run the command:

bootrec /FixBoot


The next action is the same across all the operating systems:

Redevelop the BCD keep.

First run the command also below to back up the old BCD:

ren BCD BCD.old

Now reproduce it utilizing this command:

bcdboot c:Windows /l en-us /s : All


Note: If you are producing boot entries on an attached USB Flash or various other external drive, add /f between the : and also the ALL. Remember that the is reinserted through the letter of the drive that you are booting from. (e.g., C:, D:)

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How to repair your MBR (MainBoot Record)

These procedures use to any type of heritage drive offered as a boot drive on any type of recent Windows Operating system.

Usethe F12 crucial at the jiyuushikan.org Splash display to enter the bootmenu. It allows you boot from the Windows installation media or a bootable disc or flash drive.

Click on the Repair your Computer attach at the bottom of the Install Now display screen.

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Click on Troubleshoot

Select Command Prompt

Go into the following three commands in turn, adhering to each by pressing the Enter key:

bootrec /fixmbr

bootrec /fixboot

bootrec /rebuildbcd

Restart the PC with the installation media rerelocated to inspect if the repair worked

If you require further assistance, please call Technical Support.

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