How to Repair Windows 10 UEFI Bootloader

Key Takeaways:

• Problems with the EFI bootloader can cause a Windows computer to fail to boot.
• Please use the Windows 10 bootloader repair tool to fix it. This article will provide the best UEFI boot repair tool - AOMEI Partition Assistant suitable to repair UEFI boot and repair EFI partition Windows 10.
• If you are a computer expert, you can also repair UEFI boot Windows 10 from the command prompt.

A file with EFI file extension is an Extensible Firmware Interface file. 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

Before repairing UEFI Bootloader, we should first check if the Motherboard supports UEFI mode. Here is a litter trick. Right click the computer and select Manage. Then click Disk Management, and right click the disk you want to check. If the pop-up window has the option Convert to MBR, it is UEFI mode. If the Motherboard supports UEFI boot and the Bootloader has issues, you can use the following methods to repair it.

▶ Use Windows 10 Bootloader Repair Tool - AOMEI Partition Assistant

Besides using Bootrec.exe, you can also repair Windows 10 UEFI Bootloader with AOMEI Partition Assistant Professional. This software allows you to make a bootable USB drive and run Windows Bootloader repair without CD. The bootable USB allows you to enter into Window PE to check disk error and fix MBR.

Step 1. Download it first, and open it.

Step 2. At the main interface, click Tools > Make Bootable Media. Confirm the operation you are going to do and then click Next to continue.

Step 3. At next page, click USB Boot Device and then click Proceed.

Step 4. It will remind you the USB drive needs to be formatted and all the data on it will lose. If there are important files on it, make sure to create a backup in advance.

Step 5. When the operation is complete, click “Finish”.

Step 6. Now, boot the computer which has UEFI Bootloader issue. It will bring you to the main interface of AOMEI Partition Assistant in Windows PE.

Step 7. Then you could use AOMEI Partition Assistant to check disk errors in the system hard drive with Disk Surface Test feature.

Step 8. Also, you can use Rebuild MBR to repair Bootloader.

After solving the issue, it is recommended to make a system image backup. If there is any issue happens to your computer, you can restore it to an earlier state.

In addition, AOMEI Partition Assistant has many other useful features as you can see in the picture. For example, you can create portable Windows 7/8/10 on USB drive and run it on any compatible devices with Windows To Go Creator feature. Migrate OS to SSD feature allows you to clone the Operating System without reinstalling Windows.

▶ Repair Windows 10 Bootloader from Command Prompt

Windows has embedded with Bootrec.exe tool. It is a computer program file which can be used to repair MBR, Boot Sector, Boot Configuration Data, etc. To use Bootrec.exe, you have to enter into Windows RE. You can follow the steps below to run Windows 10 Bootloader repair.

Step 1. Insert Windows 10 installation media and boot from it. If you don’t have Windows 10 installation media, you can download Windows 10 Media Creation tool to create one.

Step 2. Press any key as instructed. Select a language, time, currency, keyboard, or input method, then click Next.

Step 3. Click Repair your computer, then select Troubleshoot.

Step 4. Choose Command Prompt in Advanced Options.

Step 5. Type bootrec.exe and hit enter, then input these commands and run one by one.

• bootrec /FixMbr

• bootrec /FixBoot

• bootrec /ScanOs

• bootrec /RebuildBcd

Step 6. Type exit and press Enter. Then restart the computer to see if the issue is solved.

▶Run Windows Automatic Boot Repair

You can also try to fix the faulty EFI bootloader in Windows 10/11 using Windows Auto Repair. All you have to do is go into "Automatic Repair Mode" and follow these steps. However, please boot your computer from the Windows installation media:

Step 1. Restart your computer and press the Reset button as soon as the bootloader file starts loading.

Step 2. Click Repair Your Computer on the Install Now screen.

Step 3. Navigate to Troubleshooting > Automatic Repair.

Step 4. Select an account from the list, proceed to the Auto Repair screen, and wait for the process to complete.

▶ Change BIOS settings

The boot mode needs to be changed depending on the type of disk on your system. To boot an MBR system disk, select Legacy support instead of UEFI in the boot mode, and to boot a GPT system disk, select UEFI.

To boot a GPT system disk, you need to select UEFI, "Esc", and "Ctrl "+"Alt "+"Esc" or "Ctrl "+"Alt "+"Delete", etc. Different computer systems have different BIOS keys. Pressing and holding any of these keys while the computer is booting up will allow you to enter the BIOS interface and change the settings.

More Tips to Fix UEFI Boot Issue on Windows

If your PC fails to boot, we also provide more additional ways to fix the boot process:

• Changing the SATA mode for Windows 11/10 boot repair
• Adding a disk driver to fix Windows 11/10 startup
• Rebuild BCD storage using command prompt

Windows 11/10 startup repair is quite a complex issue. There are different solutions for different causes and problems. The above methods are only applicable to common UEFI boot issues. You can use AOMEI Partition Assistant to solve more problems including reformatting drives, RAW disks, lost partitions, repartitioning failures and system boot errors.