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Have sầu you encountered the situation when a black screen pops up & says "BOOTMGR is Missing. Press Ctrl+Alt+Del lớn restart" while you are booting your Windows 10/8/7/XPhường computer? Don’t worry & take it easy! This post will walk you through 11 useful solutions to lớn fix the issue of Boot Manager missing.

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What Is BOOTMGR

BOOTMGR is short for Windows Boot Manager which refers khổng lồ a small piece of software that is loaded from the volume boot code. Usually, the BOOTMGR tệp tin is read-only và is locating in the boot directory of the partition which is mix as "active".

On most PCs, the partition is labeled as system reserved without a drive letter. If there is no system reserved partition, BOOTMGR probably locates in your primary partition C. BOOTMGR can read boot configuration data và display the operating system selection thực đơn.

However, sometimes BOOTMGR may be missing or lost due to reasons including incorrect bootable disk, damaged MBR, outdated BIOS, loose or damaged hard disk interface cables, etc.

BOOTMGR Error Messages

This issue usually appears shortly after the computer is turned on, immediately after the Power nguồn On Self Test (POST for short) is complete.

When the BOOTMGR error message occurs, the Windows has initially started khổng lồ load. And you can see the message "BOOTMGR is missing. Press Ctrl+Alt+Del to lớn restart", as shown below: 

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In addition, you may receive different messages like "BOOTMGR is missing. Press any key khổng lồ restart" or "CDBOOT: Couldn"t find BOOTMGR". 


Here is a related video for you:

Solution 1: Restart Your Desktop or Laptop

Once Windows prompts you “BOOTMGR is missing, please try to lớn restart your PC by pressing Ctrl+Alt+Del keys or any key”, follow what the error message suggests first because maybe the BOOTMGR error is just a fluke.

However, sometimes a reboot can’t solve the BOOTMGR problem. Therefore, please try the following ways if rebooting did not work.

Solution 2: Remove sầu All Removable Media

Since BOOTMGR error can be caused by booting your computer from a non-bootable hard drive, you should check if your PC is configured khổng lồ boot from a USB flash drive sầu, a floppy disk, or other non-bootable disks.

If this is the problem, please remove sầu the device & make sure your BIOS doesn’t load from any of them. Otherwise, missing BOOTMGR issue will happen again.

Solution 3: Change Boot Order in BIOS

After unplugging a non-bootable disk, perhaps Boot Manager not found error will still appear. In this case, you need khổng lồ consider checking the boot sequence in BIOS. 

Step 1: Restart your computer.

Step 2: Then press a specific key to lớn go to the main interface of BIOS. 


Step 3: Then under the Boot tab, modify the boot order khổng lồ set the hard drive sầu as the first boot device. 

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After restarting PC, if the error “Boot Manager is missing” still happens, try to lớn look for the next way.

Solution 4: Repair Master Boot Record

It is most likely that the message “BOOTMGR is missing” happens due khổng lồ damaged Master Boot Record (MBR). In this case, it is necessary to lớn repair MBR. You might be wondering about how you can repair MBR khổng lồ fix BOOTMGR is missing with USB drive sầu effectively; especially when the operating system is unbootable.

Don’t worry, we will introduce you a piece of professional partition and disk management software – MiniTool Partition Wizard. This tool has multiple editions including Free, Pro, Pro Ultimate, Server và more which are designed for users with different needs.

Professional Edition và the advanced editions all have a feature called Bootable Media, which is available when there is no OS or OS fails to boot.


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Step 1: A few seconds later, you will see the MiniTool PE Loader interface. Please launch MiniTool Partition Wizard. 

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Step 2: In the MiniTool Partition Wizard main interface, right-cliông xã the target disk and choose the Rebuild MBR feature.

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Step 3: Click Apply lớn perkhung MBR restoration. After finishing this operation, please exit the program và restart your computer again. The “BOOTMGR is missing press Ctrl+Alt+Del to restart” error might be solved by this way.

In addition to lớn performing MBR recovery, some of you choose khổng lồ use the bootrec tool. Firstly, you need khổng lồ prepare a Windows installation disc và connect it to your PC. Next, try lớn repair the issue “BOOTMGR is missing” in Windows 7 with Commvà Prompt.

bootrec /fixmbr

bootrec /fixboot

bootrec /rebuildbcd

Tip: For Windows 8/10, you need lớn type bootrec /scanos before rebuilding BCD.

To fix BOOTMGR using CMD seems to be a bit complicated. Therefore, here we suggest using MiniTool Partition Wizard since it is a more convenient solution.

Solution 5: Mark Partition Active

If you have sầu marked a wrong partition active, the computer will fail to start up và show the BOOTMGR error message because the active partition probably doesn’t contain boot files. In PC there is only one active partition & system partition or boot partition must be primary and active sầu.

In this case, you must mark the partition within boot files active khổng lồ ensure the computer runs properly. In order to solve the issue, please reset your system partition active.

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Step 1: Select the wrong active partition. You could see there are many partition functions in the left pane and please select Set Inactive.

Step 2: Select the target partition, click the Set Active function from Partition Management thực đơn.

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Step 3: At last, you will go baông xã khổng lồ the main interface of MiniTool Partition Wizard again and clichồng the Apply button to lớn make these changes effective sầu.

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Solution 6: Test Hard Drive

Another reason that may cause BOOTMGR files missing is that there are some bad sectors. What you need to vì chưng is khổng lồ kiểm tra the disk surface.

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Related article: What to Do If I Find Bad Sectors on Hard Drive sầu in Windows 10/8/7?

Once bad blocks are found, you can use the chkdsk tool khổng lồ shield them. If there are many bad blocks, in order khổng lồ avoid data loss, please bachồng up the significant data on the target disk.

Fortunately, MiniTool Partition Wizard has those two functions: copy partition and copy disk. Here we strongly suggest cloning the entire disk data to an appropriate hard drive.

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If there are no logical bad sectors detected on your hard drive, you can skip the backup operation và try the next solution.

Solution 7: Persize Windows Startup Repair

In addition, you can perkhung a Windows startup repair. This way can replace any missing or corrupted files, including BOOTMGR. You may be wondering that if there is no CD disc, can BOOTMGR is missing Windows 7 fix without CD be done? In other words, how lớn fix BOOTMGR is missing in Windows 7 without CD?

Create a bootable USB from ISO and then boot the PC from the USB drive sầu to enter the Windows Recovery Environment. On Windows 7, choose Startup Repair under the System Recovery Options window khổng lồ continue.

On Windows 8/10, go Troubleshoot → Advanced options → Automatic Repair(Windows 8) or Startup Repair(Windows 10).

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Solution 8: Reseat All Internal Data và Power nguồn Cables

The above content mentioned the “BOOTMGR is missing press Ctrl+Alt+Delete khổng lồ restart” error could be caused by loose, unplugged or malfunctioning power cables. Please try to replace the old cable with a new IDE one khổng lồ check whether your cable works or not.

Solution 9: Update the Motherboard BIOS

If the BIOS on your motherboard is outdated, sometimes you will get a BOOTMGR error message. Thus, you should ensure the BIOS is upgraded to the lakiểm tra version. If it is not, try to lớn update it first since the BIOS must be available on your computer. If you don’t know how to update it, you could find the way from the article How lớn Update Your BIOS.

Solution 10: Persize a Clean Windows Installation

If all the solutions above sầu did not work when trying khổng lồ solve the Boot Manager missing issue, it is a good way to persize a Windows installation khổng lồ repair this error. This way, it will completely remove sầu Windows from your PC. However, all data will be deleted so you’d better baông xã up important files before re-installing OS.

At first, follow solution 6 which shows you how to clone disk or partition using MiniTool Partition Wizard. Then you can start to install a new operating system. There is another professional backup software: MiniTool ShadowMaker that you can use it for Windows 10/8/7. It’s very easy to lớn baông chồng up data without booting OS with the help of this software.

Solution 11: Replace the Hard Drive

If you still receive a BOOTMGR message, you should consider that the hard drive has a physical issue. The only solution for this situation is khổng lồ replace the died or damaged hard disk with a new one & re-install Windows after that.

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"When I ran Windows 10, I got a blaông xã screen showing "BOOTMGR is missing". Luckily, these solutions are helpful lớn fix BOOTMGR. Hope you can get rid of it."Click khổng lồ tweet

Bottom Line

Here you have come lớn the over of this post. After learning so much information about BOOTMGR, we think you now know what “BOOTMGR is missing” error is and understvà several solutions to lớn solve sầu the BOOTMGR error. Now, it is time for you to lớn solve this problem in order lớn fix your computer & make it runs normally.