Troubleshooting System - Boot errors

Occasionally, computers can experience various start-up errors, preventing you from getting to your desktop and loading the operating system. In this guide, you will learn how to troubleshoot the most common boot errors and be able to fix them effortlessly.
The Problem

Often times, you will turn on your system and all of a sudden a strange message may appear. Some of these messages include:

 
  • BootMGR is missing
  • NTLDR is missing
  • Disk Read error
  • Missing operating system
  • 0xc00000e error Code
 
and many others...
 
There are several reasons why this may happen:
 
Viruses
Windows Corruption
Failed Hard Drive(s)
Failed Storage Controller
Issue with the data cables
 
Therefore, it needs to be tackled in 2 ways, software and hardware.
 
Software
 
Usually, it's only the Windows boot sector that gets corrupted. To fix this, you will need your Windows installation disc. You need to insert it in your optical drive and make sure the system boots from it. To find out how to force boot a particular device on your custom computer, please refer to the motherboard manual.
 
Upon loading Windows, you click on Next to accept the language and keyboard settings. Next screen will have a link at the bottom that says Repair Your computer. This is what you want to click on, after which Windows will automatically search for an installation and attempt to repair boot issues. If it does, restart your system and boot from the hard drive like you normally would, everything should be working.
 
This procedure can only repair certain Windows items. If your OS is corrupted beyond the limited scope of repair that the CD can do, best thing to do is simply perform a clean re-install of the OS.
 
Hardware
 
Sometimes these errors can occur due to a failing hardware. Either a hard drive failure, a loose or a failed connection, or the controller port itself may be a problem.
 
If you have re-installed Windows and the error is back, or you had problems re-installing the OS, it could mean that the hard drive is failing. To make sure it is not something as simple as the cable, it's best to try using a different SATA cable. If you only have one drive in the system, you may temporary borrow the cable from your optical drive (if you have one) and use that instead.
 
Also, it would be suggested to try different port on the motherboard and see if the issue persists.
 
If when you switch the ports, the issue goes away, then you have a defective port on the motherboard and the board need replacing.
 
However if none of these make a difference then most likely you have a failing hard drive and needs to be replaced.
 
*Disclaimer: AVADirect and its Staff are not responsible for any damage to software/hardware, loss of data or personal injury by following our How-To guides. These guides are provided only as an aid to help you troubleshoot system problems. If you do not feel comfortable performing these steps its always best to send in your system to a local repair shop or contact an appropriate technical support line for additional assistance.