How to Fix the "Default Boot Device Missing or Boot Failed" Error

The "Default Boot Device Missing or Boot Failed" error often appears on Windows laptops and computers, indicating a problem with the boot device that prevents the system from finding the boot disk. This issue is typically caused by incorrect BIOS settings, a damaged hard drive, or a missing boot device.

Main Causes of the Error

BIOS Configuration Issues: The boot disk may not be listed as a recognized boot device.
Hard Drive Problems: Physical damage or failure of the drive can trigger this error.
Incorrect Boot Settings: Accidental changes to boot parameters might also cause this issue.

Steps to Fix the Issue

Try the following methods to resolve the problem:

1. Check BIOS Settings

Restart your computer and enter the BIOS (usually by pressing F2, Delete, or Esc).
Find the Boot section and make sure your hard drive is set as the primary boot device.
If settings have changed, set the correct device as a priority and save changes by pressing F10.

2. Enable UEFI Mode

Some systems require switching to UEFI mode:

Open BIOS and go to Boot Mode.
Set the mode to UEFI if it’s not already selected, then save the settings.
Restart the system and check if the error is resolved.

3. Check the Hard Drive

A damaged hard drive could also be the culprit. If possible, connect the drive to another computer to check for errors. If the drive is inaccessible, it may need to be replaced.

4. Use Windows Recovery Tool

If you have Windows installed, try using the built-in recovery options:

Create a Windows bootable USB or use a recovery disk.
Boot the system from this media and select System Recovery.
Follow the on-screen instructions to attempt a boot repair.

5. Consult a Professional

If none of the above methods work, consider consulting a professional to diagnose and repair the hard drive or configure BIOS settings.

We hope these methods help you fix the "Default Boot Device Missing or Boot Failed" error and restore your computer’s functionality!