Your Windows 10 computer wouldn’t boot properly if the EFI bootloader is corrupt. Fortunately the bootloader problem(s) can be fixed easily using either Windows’ automatic repair or by running the repair commands in the Command Prompt window.
EFI files are Bootloader executables, exist on UEFI (Unified Extensible Firmware Interface) based computer systems, and contain data on how the boot process should proceed. If UEFI Bootloader is damaged or lost, you cannot boot the computer. In this case, you should repair UEFI Bootloader. How to repair Windows 10 UEFI Bootloader?
Sep 09, 2019 EFI files are Bootloader executables, exist on UEFI (Unified Extensible Firmware Interface) based computer systems, and contain data on how the boot process should proceed. Sage 50 accounting software. If UEFI Bootloader is damaged or lost, you cannot boot the computer. In this case, you should repair UEFI Bootloader. How to repair Windows 10 UEFI Bootloader? Recover Windows 10 Bootloader From The Command Prompt. If damaged, Windows bootloader can be recovered with the use of command prompt. If the system won’t load, launch the diagnostic utility from the boot disk: Start the computer using the boot disk. Start up your dilapidated computer with the USB or DVD Windows 10 recovery media in the system.You want to get to the Advanced options screen so that you can open the beloved command prompt. When the computer boots off the recovery media, pick the Troubleshoot option. Then choose Advanced Options. And head on over to the Command Prompt. How to repair broken UEFI Bootloader in Windows 10 on Surface Pro Posted on May 3, 2016 by Windows 8 rt/pro The Unified Extensible Firmware Interface (UEFI) protocol replaces the popular BIOS with new advantages such as faster startup and larger than 2.2 TB disks supported. Nov 03, 2016 How To Restore Windows 10, 8, 7 Boot Loader Read about restoring Windows 10 bootloader from a working or faulty system with the command prompt. Recovering bootloader after installation of Linux, Ubuntu, Windows Often the reason for the operating system to fail when loading is the damaged bootloader Windows 10.
Both the methods are explained in detail below: Method 01: Using Automatic Boot Repair The first, and probably the best, approach to repair corrupt EFI bootloader in Windows 10 is by entering into Automatic Repair mode. Here’s how:
■Enter into Automatic Repair mode Power on your computer, as the boot files start to load, press the reset button. Repeat the process for two more times. In the third attempt, Windows automatically enters into the Automatic Repair mode, and diagnoses, detects, and attempts to automatically repair the corrupt bootloader file from there.
■Restart the computer
Restart your PC after the bootloader issue(s) are fixed. This ensures that all the repairs and settings become effective, and your Windows 10 computer works flawlessly henceforth. Method 02: Using the Repair Commands If the automatic repair fails to fix the issue, you can use Command Prompt to manually enter the repair commands. Here’s how:
■Get to the Troubleshoot window Click the Advanced options button on the Automatic Repair window, and click Troubleshoot on the Choose an option window that opens up next. This takes you to the Troubleshoot window. You will see the Advanced options button on the Automatic Repair window when Windows fails to repair the bootloader automatically, and prompts you for further inputs. At this point, you can either shutdown your PC to try a different method to fix the issue, or manually troubleshoot the problem as explained here.
■Get to the Command Prompt window Click Advanced options and click Command Prompt on the Troubleshoot and Advanced options windows respectively. This opens the Command Prompt window. Here you can enter the commands to manually repair Windows 10 EFI bootloader.
■Run the commands Type BOOTREC /FIXMBR, press Enter, type BOOTREC /FIXBOOT, and press Enter again. Where the BOOTREC /FIXMBR command fixes the issues with Master Boot Record (MBR) when executed successfully, you may get the Access is denied error message while running the BOOTREC /FIXBOOT command. This error can be fixed using a different command from the same Command Prompt window. ■Fix the Access is denied error Type BOOTSECT /NT60 SYS and press Enter, and again type BOOTREC /FIXBOOT and hit Enter. The BOOTSECT /NT60 SYS command updates the bootcode, and re-entering BOOTREC /FIXBOOT executes the command successfully. The BOOTREC /FIXBOOT command updates the information about the booting files.
■Identify Windows Type BOOTREC /SCANOS and press Enter. This executes the BOOTREC command with the SCANOS switch. The BOOTREC /SCANOS command identifies the number of Windows’ instances installed on the hard drive.
■Rebuild the BCD file Type BOOTREC /REBUILDBCD and press Enter. This executes the BOOTREC command with the REBUILDBCD switch. The BOOTREC /REBUILDBCD command rebuilds the BCD file, thus removing any issues in it.
■Finalize the fix
Type EXIT
Reinstall Windows 10 Bootloader Uefi
in the command window, press Enter, and click Continue on the Choose an option window. This closes the Command Prompt window, and restarts Windows 10 in normal mode. Upon successful restart, you can back up your data, create restore points, etc. to make sure the future errors, if they ever occur, can be fixed comparatively sooner and with less trouble.
Hi, I am trying to help a friend repair her son's computer so I don't have a lot of context as to what happened prior to this issue, but I will try to be as comprehensive as I can in describing what steps I've taken so far.
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Initial Observations
This is a Windows 10 PC, with a 2 TB disk. It is UEFI enabled and GPT partitioned. Computer boots up and immediately begins Preparing Automatic Repair. The computer reboots without going to the Choose an option menu and boot-loops through this sequence.
Method 1
F11 to force boot options menu
Boot into local disk recovery partition
Launch cmd prompt in recovery environment
Commands issued:
bootrec /fixboot
The operation completed successfully.
bootrec /rebuildbcd
OUTPUT: Total identified Windows installations: 0
Method 2
Created recovery drive on my own Windows 10 PC
Booted problem PC with the recovery drive
Attempted startup repair multiple times (no luck)
Attempted bootrec commands again (no luck)
Method 3
Fix Uefi Bootloader Windows 10
I attempted the solution suggested HERE. At step 5, I got this error:
Windows 10 Bootloader Fix
Path not found - C:boot
Fix Windows 10 Efi Bootloader
So I changed the operations for steps 5 & 6 to target the system recovery volume on the disk: