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Disk Boot Failure -Insert System Disk & Unable to Start Computer

I had a busy weekend this time because of one of my friends and his old desktop computer. He was unable to start his computer because of an error Disk Boot Failure and called my assistance. I must admit, it is an old PC and wasn't in use for the past four months. He first thought the error message was due to corrupted OS installed and asked my help to reinstall Windows because he has not much IT experience. Before going to tell the entire story I would like to explain what is Disk Boot Failure error and how to troubleshoot it.

Reasons to Get Disk Boot Failure Error

Major reasons for the error Disk Boot Failure or Disk Boot Failure - Insert System Disk are:
  1. Damaged Hard Disk Drive(HDD) on your computer

  2. Faulty BIOS Settings and wrong boot sequence

  3. Loose connections and Motherboard issues

  4. Hardware and Software conflicts

  5. A corrupted OS or Improper Disk partitions

How to Troubleshoot and Resolve Disk Boot Failure - Insert System Disk

In case if you are facing this error while restarting your laptop and unable to go further, follow the instructions provided here.

  1. Log on to BIOS and Check Booting Order

    Improper booting order sequence is one of the reasons to get the error Disk Boot Failure -Insert System Disk when you start your computer. This Disk Boot Failure prevents your computer from booting and you won't be able to start loading OS on your computer. To access BIOS follow the steps below.

    1. Restart your computer

    2. Press [F2] or [Del] (key provided by your system vendor to access BIOS)

    3. Click on Boot and select the boot option to set HDD as the first booting device. Press [F10] to save it before exit(or the key provided in BIOS to save the settings)

    By setting HDD as the first boot device, you can prevent most of the  issues like Disk Boot Failure - Insert System Disk

  2. Reset Current BIOS Settings

    If the error Disk Boot Failure - Insert System Disk persists, you may need to reset the BIOS and check for the issue. To perform this task I recommend you to visit the link below.
    How to Reset BIOS On Your Laptop

  3. Disconnect Peripheral Devices From Motherboard and Connect Them Back

    Here you need to open the computer case and disconnect all peripheral devices from motherboard including HDD, DVD R/W, RAM etc. Clean dust and then reconnect all the devices with the motherboard. Make sure there is no loose connection. Now power on the computer and start it to check if you still receive the error Disk Boot Failure.

  4. Presence of Incompatible Hardware Devices

    It is possible that after connecting incompatible hardware devices on your computer you may receive the error message Disk Boot Failure and the system fails to boot properly. So it is always advised to disconnect the recently added hardware and check for the issue.

  5. Corrupted OS or Improper Partitions

    Sometimes due to the improper partition on the hard disk may cause this error. Another important reason is corrupted Operating System. If the OS installed on your laptop is corrupted, you cannot start your computer. These two are very important possibilities to get disk boot failure error.

  6. Failed Hard Disk Drive (HDD)

    Another reason to get this error on a computer is HDD failure. If it went wrong, you cannot load OS to the RAM and the system boot will fail. So to check this error you must check whether the HDD went wrong. You can perform this task by connecting your HDD as a slave of another one and check if this unit is detected by the computer. If not, it is the time to purchase a new one.

  7. Motherboard issues

    Another reason is motherboard failure. Sometimes this error message will come as a result of motherboard issues. It is advised to check your motherboard if the issue is not related to HDD and other reasons mentioned.

Other Computer Hardware Related Articles

  1. HDD S.M.A.R.T Command Failed & Unable to Start Laptop

  2. How to Check The Frequency of RAM On Your Laptop

  3. How to Connect Two Laptops Using USB Cable

  4. Check Laptop Memory Problems Using Windows Memory Diagnostics Tool



Nivin said…
Thanks Alex, very informative post.
Arun said…
I followed your 3rd step and it worked fine. Thanks Alex
Susan said…
Excellent article
however another hard disc running, cuz 2 hard disc have, single disc boot failure making. another true running. keyboard even running doesn't