BOOTMGR stands for Windows Boot Manager. Beginning with Windows Vista and now standard in Windows Server 2008 and Windows 7, BOOTMGR is used to find an active partition and display an operating system menu for your choice. It's similar to the NTLDR for the previous windows system like Windows XP and Windows 2000.
The BOOTMGR is missing error is quite common in Windows Vista and Windows 7. Sometimes, when you press the Power button of your computer, you get a black screen saying "BOOTMGR is missing, Press CTRL+ALT+D to restart.", but when you did as what you are suggested, the error appears again. This error happens even when you're installing another Windows 7 system to the existed ones. Luckily, there's a method to repair this common headache.
It's actually not as hard as you'd imagine repairing a "BOOTMGR is missing" error, as long as you've got the right things prepared. To fix the "BOOTMGR is missing" error is why this article comes in.
This method requires you to have a Windows bootable disk or Windows Installation DVD. First make sure your computer is booted up from USB/CD/DVD drive and then follow the instructions below to repair this error.
1. Insert your USB bootable drive or Windows Installation DVD disc, restart your computer and boot from USB or CD/DVD drive.
2. In the open screen, choose your preferred language, time currency and Keyboard. Mouse over and click the "Repair your computer." option in the bottom left side.
3. Depending on what system(s) you have installed, Windows will try to locate the installation destination for Windows Vista or Windows 7.
4. Recovery Options will show up and click Startup Repair.
5. A message "Startup Repair is checking your system for problems ..." will appear.
6. When complete, you will be prompted to reboot, and you should eject the Windows Installation DVD from CD/DVD drive.
7. Now your computer should run as normal, and you see your familiar desktop again.
The error BOOTMGR is Missing often comes along with failure of booting the computer. You can resolve this issue with a Windows installation CD/DVD disc. However, if it fails, you will need a data recovery software to retrieve lost data back.
Launch the Recoverit software and select a preferred data recovery data mode and if you experience challenges with your Windows 10 booting up, select the "Recover from Crash Computer" option. On the next pop up Windows, click the "Start" button.
Select from either USB bootable drive or CD/DVD to create a bootable drive and click the "Create" to initiate the process.
The subsequent pop-up notification will ensue, requesting you to format the USB drive. You should have your vital data backed up before clicking the "Format" button.
Avoid ejecting the USB flash drive as the bootable drive development process begins and follow the next instructions or view the full guide to begin the data recovery process.
Creating or developing a bootable drive may take a while before you get three easy steps concerning the data recovery solution.
Also, ensure to modify the computer boot sequence before initiating data recovery from unbootable Windows 10. Set this to boot directly from the bootable media that you have just developed. You should restart your computer and enter the BIOS using the F12 function key. BIOS entry key varies across different systems. Get some knowledge on the process of setting up your computer to boot directly from the USB drive.
As soon as you are done booting from the bootable drive, Recoverit will automatically initiate and you can copy data from either the hard disk or use the Windows 10 to recover lost data. We are glad this piece of information has been helpful, you never have to worry about data recovery from unbootable Windows 10 as this guide will help fix challenges encountered from lost data on Windows 10 operating system.