Fix " BOOTMGR is Missing " Error on Windows Startup

Either you have seen this or come across this error but its kinda well known as one of the dreaded error on a computer .. This error usual comes from the bootsector which is the area on the hard drive that contains information used to load up the operating system .

 Possible reasons that causes BOOTMGR error
 
      • File system error due to corrupted system files
      • BIOS mis configurations, like boot priority of the hard drives current connected.
      • Operating system Upgrade issue on an outdated BIOS version can be cause mis configuration of    bootmgr files .
      • Virus Attack
      • Unplugged or loose cables on harddrives may cause this myth error to appear

Ways To Fix : 

When The BOOTMGR error arises means you cant start the PC normal . You can try one of the below solution to try and fix the issue .

Solution 1 : Check If its a Hardware Issue

Turn Off your computer and try check cables and controllers intarfacing your drives . Make sure they are all connected and working properly and replace any if you suspect a fault then restart

Solution 2 : Check BIOS settings

If you have made any changes or installed a new hardware then try check and configure BIOS settings . If you are trying to boot from an external drive then change boot priority options . and if maybe before the error appeared you kinda made changes on BIOS options try revert back to default settings and reboot your computer .

Solution 3 : Run a Startup repair

In this case if the error is arrised due to misconfiguration or corrupt system files then this might help fix and replace any missing or system files . You might need a Windows bootable CD or Bootable USB device to run start Up repair .

Quick guide on how to run start Up repair:
     • Insert a Windows bootable CD and allow it to boot from the CD .
     • After it boots Up Follow the onscreen Instruction and hit Next.
     • Then Click on Repair your Computer.
     • The Wizard will try and find your OS installation directory. Click Next when it finishes .
     • Then on System Recovery Options select Startup Repair
     • The startup repair will fix any missing files and configuration and then prompts you to reboot your PC . If it all goes right the PC wlll then start normal without the BOOTMSG error message

 

Solution 4 : Write a new Partition Bootsector

This is easy and should be done within a system recovery options . Accessing System Recovery Options is covered in the above steps by using a windows CD or Bootable USB device . If you dont have a windows CD then Press F8 when powering up the PC .. On windows 7 this key brings Advanced Boot Options then select Repair Your Computer if its available among the listed options. This option is not available on all OS version of windows 7 .

Then when you get into System Recovery Option select Commnad Prompt from the listed options and type the command belowe

                             bootrec /fixboot and Press Enter

Or type this

                             Bootrec /RebuildBcd and Press Enter

If asked to add installation to boot list ? type Y or Yes then Press Enter

You should see the result message as below at the end

                        The operation completed successfully.

The command will write a new partition bootsec and any corruption will be corrected . Then reboot

Solution 5 : Reinstall The Operating System

If any of the above method has failed then its time to try install a fresh copy of windows .. Sometimes driver issues and virus attack might cause this error . Perfome a clean install of OS and check if the problem still exists .

If all of the above doesn't solve the problem then you might be facing a hardware issue . try replacing the hard drive or may be take it to a service center for more advanced troubleshooting .