Get the fix for “BOOTMGR is Missing” boot error in Windows Vista, Windows 7, Windows 8, Windows 8.1, or Windows 10
The one created with the Tools tells me CDBOOT: Couldn't find BOOTMGR, and the second one tells me 'Operating System not found'. And I just can't get them working. Everything is where it should be, I checked it and compared it with a Windows 7 DVD.
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Explained below are the most common solutions you can do to repair this error, but we also recorded a video about this stubborn error and what to do about it without a Windows setup DVD (or if this Windows install CD fails) using our recovery disc Easy Recovery Essentials by NeoSmart Technologies.
Alternative BOOTMGR error messages:
The most likely shown error message would be “BOOTMGR is missing. Press Ctrl Alt Del to restart”, but your PC may also display “Couldn’t find BOOTMGR”.
Both refer to the same error that is causing your PC to fail to start.
Why BOOTMGR is missing appears
When you turn on the computer, the POST (stands for Power On Self Test) processes begin to run by BIOS before booting your Windows copy. The error appears right after the POST process is completed and Windows starts to load.
The POST is a set of routines that are run immediately when starting the PC, such as checking if your RAM, peripheral devices and other hardware components your PC has are working correctly.
After these routines are completed by BIOS, the Windows boot loader begins, where this error is going to appear.
The BOOTMGR error can be caused by many things, including boot sector viruses, failed Windows installs or updates or crashed hard disks.
A very common reason for your PC to fail loading and displaying this error is when it tries to boot from a hard or flash drive that is non-bootable.
Guaranteed Fix: Use Easy Recovery Essentials
Easy Recovery Essentials is guaranteed to fix the “BOOTMGR is Missing” error automatically using its built-in Automated Repair option. EasyRE is currently available for Windows XP, Vista, 7 and 8 and can be downloaded and created on any PC.
You can download Easy Recovery Essentials from here.
Other fixes for BOOTMGR is corrupt or missing
We’ve written below 5 fixes that you can use today to repair this error. Go through each, from 1 to 5, step by step, and check which one will work for you.
Windows Setup CD/DVD Required!
Some of the solutions below require the use of the Microsoft Windows setup CD or DVD. If your PC did not come with a Windows installation disc or if you no longer have your Windows setup media, you can use Easy Recovery Essentials for Windows instead. EasyRE will automatically find and fix many problems, and can also be used to solve this problem with the directions below. Fix #1: Remove non-bootable discs
The first and easiest fix is to check for any existing media in your USB ports, floppy drives or optical drives (CDs, DVDs).
BOOTMGR error will appear if your computer is trying to boot from one of these drives that have a non-bootable media inserted. Once you remove a USB drive or CD from which the computer was trying to boot from and couldn’t, the error should disappear.
After it disappears, consider changing the boot order from BIOS to make sure your PC boots from the hard drive and not from any other non-bootable drives next time.
This is recommended to prevent future errors like this.
Fix #2: Use Startup Repair
This repair method works if you have the Windows installation disc.
Here are the steps to fix the BOOTMGR error with an installation CD:
Fix #3: Use bootrec.exe to rebuild the BCDbootrec.exe is a tool built in the Windows Recovery Environment (Windows RE) that you can use to troubleshoot and repair the error.
bootrec.exe can repair boot configuration data and master boot records. BCD, which stands for Boot Configuration Data, contains boot configurations options and controls how Windows is started.
Here are the steps for accessing bootrec.exe to rebuild the master boot sector:
Fix #4: Run System Restore
The next solution will work only if you have System Restore enabled on your Windows.
Here are the steps for restoring your PC with System Restore:
Fix #5: Use bootrec.exe to fix the boot
The partition boot sector is stored on the hard disk drive and contains the necessary code to start the Windows boot process. If this partition is corrupt or not properly configured during a Windows install it would lead to “BOOTMGR is missing or corrupt” errors at startup.
This method needs a copy of your original Windows installation disc.
Here are the steps to fix this error using the bootrec.exe tool, the same tool used in Fix #4 above:
More InformationLinked EntriesSupport Links
Applicable Systems
This Windows-related knowledgebase article applies to the following operating systems:
My aim is creating a VM with Windowd 7-64 as guest Os on a Linux host machine. I created a VDI with Windows 7-64 as selection, on an ext4 partition without any pb. When I want to boot the installation CD for installing Windows 7, I get the following message: 'CDBOOT: couldn't find BOOTMGR'. Can you help me. I suppose I am not the first, but I didn't find the good way in this forum. Thank you. I found the issue. It was written in the embedded assistance Chapter 3.1.2 Configuring virtual machines-64-bit guests-Warning: 'On any host, you should enable the I/O APIC for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. In addition, for 64-bit Windows guests, you should make sure that the VM uses the Intel networking device, since there is no 64-bit driver support for the AMD PCNet card. If you use the 'Create VM' wizard of the VirtualBox user interface, VirtualBox will automatically use the correct settings for each selected 64-bit operating system type.' And now, it's OK. Comments are closed.
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December 2022
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