BOOTMGR missing error is displayed to the user when there’s no rooting device available. This happens due to many several reasons. In some cases, corrupted files, corrupted hard drive sector are the reason behind this error. but, in many cases, users have changed the booting device to a device which doesn’t have any OS. If you’re trying to boot into any CD/Pendrive to install the Windows OS and BOOTMGR is Missing error is displayed, this clearly means your Pendrive or CD don’t contain the valid installation files. You can learn to make bootable Pendrive. If you’re not installing the Windows and getting this error in normal booting, then we’ve several fixes for you in this article. Make sure you have Windows installation files too, as in some cases it’s required to fix this problem.
Many times, users have changed to the priority of booting devices. Simple, when the computer turns on it’s looking at all the devices from where it can boot. Now, in the BIOS menu, the user can rearrange the booting priority of the devices. The device which is set as the main device from where the computer has to boot, and that device don’t contain properly installed OS, you’ll get bootmgr is missing error. There are many other reasons behind this problem that we’ll be discussing below with fixes.
We have shown all the possible fixes to this problem below. Follow the steps in the sequence they are written below. This will help you in sorting out the reason behind this problem easily.
Solved: BOOTMGR Is Missing In Windows 10, Windows 8, Windows 7
Restart Your Computer and Plug Out All External Devices
Restarting your computer might solve this problem on its own. Maybe bootmgr is missing error is just shown due to any temporary problem. Also, try direct power cut off power off shut down with your computer. Just cut the main power supply while error is displayed. In laptops, long press power button.
Most of the times, any device is plugged into your computer which is bootable and many computers automatically boot into the external bootable device. Maybe it’s the case with you. So, we recommend you to plug out things like Pendrives, CD/DVD drive from your Computer USB ports.
Change Booting Priority
As we listed above that change in the booting priority might be the reason behind this problem. Sometimes computer automatically boots into external storage device results in the unsuccessful boot and displaying the BOOTMGR error. Below are the steps to successfully enter into boot device selection menu and changing the boot priority. You need to enter into BIOS menu to change the booting priority.
- Enter into BOOT menu by turning on and pressing the key which is assigned to enter into the boot menu. Every manufacturer has assigned different keys. Here’s the tutorial on entering into BOOT Menu. You’ll get the list of all the keys which are used to enter into boot menu in various laptops/computers.
- Once you’re in the boot menu, navigate to BOOT tab using arrow keys.
- You’ll get instructions to change the boot priority. Use that instruction to change the booting priority.
- Windows is probably installed on Hard Drive, so move Hard Drive top of the list.
- Exit saving changes and your computer will now reboot.
If the bootmgr is missing problem is raised due to change in boot priority of available devices, the problem should be fixed now. If it’s not gone, then there are some other fixes waiting for you below.
Check If Hard Drive Is Connected and Working Properly
Sometimes the hard drive isn’t connected or is damaged. If you’re able to boot into the hard drive where Windows is installed, there might be possibilities that Hard drive is disconnected or not working.
If you’re using CPU, then check if all the wires are connected properly. If your laptop users, don’t try to reach the hard drive. Just follow the steps given below as in laptops, drives aren’t connected using long cables. But, in CPU there are possibilities that wires connected to drive might be loosed.
Perform Windows Startup Repair From WinRE
Note: You need Windows installation files in this case. If you want to run Startup Repair from WinRe, you should have bootable Pendrive with installation files or a DVD/CD of the Windows OS you’ve installed.
Windows Recovery Environment is one of the coolest recovery features. This allows users to use Windows installation media to solve currently booting or Windows related issues. The corrupted system files and folders will be installed. But, user files and folders will not be deleted.
- Boot into USB/CD where Windows Installation files are available. You can read our first method again. Just set the USB/DVD on the top of the booting priority and computer will boot from CD/DVD or the USB. (Whatever you’re using)
- Once the computer is booted into USB/DVD, select the language in which you want to run the setup and click Next.
- Select Repair Computer option, and in the System Recovery options select the drive where your Windows is installed.(Mainly C: Drive) and click Next.
- Again select Repair your Computer option.
- Select the OS you want to repair and click Next.
- Now, select Startup Repair in System Recovery Options.
- Now Windows will repair itself and bootmgr is missing in Windows 7, Windows 10 or any other version of Windows should be fixed.
But, if you’re still in trouble with this problem. You can try Rebuilding BCD (Boot Configuration Data). If this data is corrupted, Windows can’t boot because it can’t read the files and configuration required to boot successfully.
Repair Boot Configuration Data
Sometimes, BCD is corrupted in Windows due to various problems. If you try repairing BCD then your problem might be solved. In many cases, corrupted Boot Configuration Data is corrupted resulting in many problems related to booting in Windows. There’s a file stored in Boot folder under the \Windows\System32 directory. If it’s harmed by virus or user himself does several changes without having proper knowledge then this problem occurs.
If you want to repair the BCD file, you need to have CMD (Command Prompt) access. And if bootmgr is missing error shows on booting time, there’s only one way left to access the CMD which is using Windows installation files.
In the method given above we’ve used Windows installation files to repair Windows and in this method, we’ll use it to access the CMD to repair BCD.
- Boot into Windows installation files using Boot Manager. (Read the method given above, we’ve explained how you can do this)
- Select language and other options displayed, then click Next.
- Click on Repair Computer option, now select the OS you want to repair and click Next.
- Select CMD(Command prompt) option which is located inside System Recovery Options dialog box.
- Once CMD appears, type:
and hit enter. Wait till the command is executed successfully.
- Restart your computer and check if you’re able to boot into Windows or not.
Restore Windows To Available Restore Point
In many articles about fixing the problems in Windows, we’ve shown how to fix the problem by restoring Windows to the available restore points. It’s because whenever any major change is made to Windows, it’ll automatically create a restore point. Most of the errors are caused by any major change done to the system by the user or by any software. So, if you restore Windows back to that restore point, your problem might be fixed. It’s like way back machine. Also, user files will not be affected and deleted. Only system related files and settings are reverted.
Maybe bootmgr is missing problem also due to any major change was done by you to the system or this booting problem occurs after installing any OS. So, you should really try this step and might work in your case if all the methods given above didn’t work for you.
Windows installation files are required in this method.
- Boot into Windows installation Disk/Pendrive.
- Select Repair Your Computer option, then select the Drive where Windows OS is installed and click Next.
- Click on System Restore Option and follow the instructions.
- Select the recommended Restore point or click on Custom, select the Restore Point from the list and Restore Windows to that Restore Point.
- Wait till the system Restore is finished and now bootmgr is missing problem should be fixed.
Re-Install Windows OS
If methods given above didn’t help you then prefer re-installing Windows. But, we recommend you to clean install Windows this time. Just format the drive where your previous Windows was installed and then re-install Windows on that partition.