
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.

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