How Do I Restore Windows Boot Manager in UEFI BIOS

How do I restore Windows Boot Manager in UEFI BIOS? In this article, you can learn the necessity of repairing Windows Boot Manager first and know how to make it. Beside, the guide on how to avoid future isssue is also provided.


By Hedy / Updated on August 2, 2023

Share this: instagram reddit

About Windows Boot Manager in UEFI BIOS

"I used my computer to install W7 on a HDD and it worked flawlessly. Except that when I removed that HDD and rebooted, I wasn't able to boot on my regular HDD. I went into the BIOS and saw that the Windows boot manager entry had disappeared. I tried repairing it using bootrec but it didn't change anything. I also tried resetting the UEFI firmware to factory settings, but still nothing. How do I restore Windows Boot Manager in UEFI BIOS?"

Before we delve into the troubleshooting process, let's understand the key components involved. UEFI (Unified Extensible Firmware Interface) BIOS is a modern replacement for the traditional BIOS firmware. UEFI provides an interface between the computer's firmware and the operating system and supports features like faster boot times, larger disk support, and improved security.

The Windows Boot Manager is a small piece of software that allows you to choose the operating system to start when you power on your computer. It is stored on the computer's UEFI firmware and is loaded during the boot process.

Some Windows Boot Manager issues and reasons for it

Although Windows Boot Manager plays a vital role in the booting process, people always complain that they have encountered various problems such as:

1. Boot errors and failure to boot

One of the most common issues with UEFI BIOS is encountering boot errors or being unable to boot into Windows.

2. Corrupted Boot Manager

UEFI BIOS relies on the Boot Manager to launch the operating system. If the Boot Manager becomes corrupted, it can lead to booting problems, including the dreaded "Bootmgr is missing" error.

3. Accidental deletion of Boot Manager

Sometimes, UEFI Windows Boot Manager missing Windows 10 occurs because users accidentally delete the Boot Manager partition while trying to fix other issues. This can result in a non-bootable system.

There can be various reasons for these Windows Boot Manager problems, including:
Incorrect boot order or boot devices
◆ Corrupted or missing Boot Configuration Data (BCD)
◆ Malware or virus affecting the boot manager
◆ Outdated UEFI BIOS
◆ Software or hardware conflicts

How do I restore Windows Boot Manager in UEFI BIOS?

If you have met any one of the Windows Boot Manager issues when booting the PC, don’t fret, you can try the steps below to see how to restore Boot Manager Windows 10:

Step 1. Accessing UEFI BIOS Settings

Restart your computer and press the appropriate key to access UEFI BIOS during startup (usually Del, F2, or F10).

Step 2. Navigating to Boot Options

Inside the UEFI BIOS settings, navigate to the "Boot" or "Boot Options" tab using the arrow keys.

Step 3. Selecting the Boot Manager Entry

Look for the entry related to "Windows Boot Manager" and select it as the primary boot option.

Step 4. Restoring Windows Boot Manager

Save the changes and exit the UEFI BIOS settings. Your computer should now attempt to boot using the restored Windows Boot Manager.

Bonus reading: How to avoid future Boot Manager problems

As you can see, it's frustrating to encounter annoying issues with Windows Boot Manager. To help you avoid such Boot Manager problems in the future, I highly recommend a versatile disk manager called AOMEI Partition Assistant Professional.

With this powerful tool at your disposal, you can effortlessly modify the boot sequence, delete, backup, restore, and refresh your EFI/UEFI BIOS Boot Options without the need for manual BIOS entry or intricate startup entry modifications.

That is to say, you can take advantage of this tool's ability to back up your boot options while your PC is running smoothly, providing a safety net against the dreaded "BOOTMGR missing" issue. Should you encounter this error in the future, simply utilize your USB to access the tool and effortlessly restore the original boot settings, saving you from unnecessary downtime and ensuring a seamless system recovery process.

Let's see how to backup Windows Boot Manager in Windows 10 or 11 and how do I restore Windows Boot Manager in UEFI BIOS when Boot Manager issues happen.

Download Pro DemoWin 11/10/8.1/8/7/XP
Secure Download

Step 1. Click the boot option you want to back up to make a backup so that you can recover if necessary.


Step 2. Select a location on your PC and click "Save" to save the backup.


Step 3. Finally, the backup will create a .PAUB file.


Then, you will get a duplication of your Windows Boot Manager and then you can follow the steps below to restore Boot Manager in Windows.

Step 1. Click to restore the boot option you just backed up if the partition or boot files get lost or corrupted.


Step 2. Locate the .PAUB FILE you backed up and select it to restore.



How do I restore Windows Boot Manager in UEFI BIOS? After reading this post, you can master the reasons behind it and address the boot issues. Since restoring the Windows Boot Manager in UEFI BIOS is crucial for a smooth and efficient startup process, it’s recommended to make a backup of the Boot Manager using AOMEI Partition Assistant Professional.

Hedy · Staff Editor
Hedy is an editor of AOMEI Technology. She is very good at solving problems of partition management, and she wants to share all the problems she had already solved to users who met the same questions.