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Also make sure all the installation files are included in the source. Sometimes, the DVD or flash drive can be corrupt, which also may cause this error. Make sure the ISO image of the Windows 7 installation file is correct and from a reputable source. For example, it can be a DVD or CD or USB drive. Use Startup Repair on Windows OEM machines like laptop etc.Ĭheck your bootable source. Rebuild the boot configuration data (BCD) from WinRE.ĭ. Run Startup Repair from Windows Recovery Environment (WinRE)ī. Fix #1įirst let’s implement the Microsoft support solution itself.Ī. For the complete procedure of each solution, you can lookup the source. I gathered this solutions after reading several forums, posts and from my own experience. But just like a good doctor, who doesn’t know the cause of a “typical fever”, we will to try to implement some solutions by eliminating each cause.įirst read this article thoroughly before you dwell to implement these solutions.

It can be due to several reasons – BOOTMGR file may be missing, may not be existent on the boot drive, boot sector viruses, faulty hardware, BOOTMGR corrupted by failed Windows installs etc.ĭifferent Things to Try to Eliminate “Bootmgr is Missing” ErrorĪs said above, the cause of this error can be many.

The common reason for “BOOTMGR is missing” is, when the BIOS fails to find this “tiny piece of program”.

After these tasks are completed by BIOS, the Windows BOOTMGR starts, where this error appears.

The error appears just after this little process is complete.

POST generally checks for RAM, peripheral devices, hardware etc.

This happens just before the Windows boot.

When your PC starts, the BIOS starts a set of processes known as POST (short for Power On Self Test).

To know the process for this error, let us know a few more things.

Damaged or Loose Hard-Drive Interface cables.

Corrupt Hard-drive sectors (hardware related).

Hard-drive and Operating system upgrade issues.

But from Vista to Win 10, currently this “little code piece” links the hardware to OS.įirst of all let’s see the many reasons why you get this message immediately after starting the computer. Earlier there was a boot loader called NTLDR in the XP and NT era. It is the crucial link for the OS to initiate. So basically it’s like a middle-manager between your hardware and OS. It automatically runs when you start your PC. This is a tiny piece of program that resides in your boot drive.

Replace Win XP NTLDR Boot loader with Win 7 BOOTMGR.

Boot from the Windows 7 Installation DVD.

Different Things to Try to Eliminate “Bootmgr is Missing” Error.