windows 10 boot failure : boot device not found

Hi, I have asus republic of gamers laptop which was running on Windows 7.

Last week I upgraded it to Windows 10 and it was working fine.

Last night after shut down it was installing some updates and after that it did not start.

There is a message on screen "boot device not found".

How do I resolve that?

Can I take my Laptop to nearest Mircosoft center ?

I live in Portland , OR, USA.

Would it cost me and if yes , how much ?

Thank You

Welcome to Microsoft community.
We understand that, you get error message  "boot device not found" on your system.

Please do not panic with the error message and we will assist you to resolve the issue.

I suggest you to check in BIOS, if the hard disk is listed?


I suggest you to follow these methods below to fix your issue:  
Method 1:

Try to refer to these sections Use a recovery drive to restore or reset your PC    and Use installation media to restore or reset your PC in the article below, to resolve the issue and check, if it works.

Recovery options in Windows 10

If the issue still persists, follow the method 2.

Method 2:

Run CHKDSK through Command Prompt (Admin) Window.

1. Right click on the Start Windows icon, then the Command Prompt (Admin).

2. Type these following command, and replace the X with the drive letter you wish to scan: “CHKDSK X:”, we suggest you use “CHKDSK X: /F”, only then it can correct errors.

3. Hit the enter key, Command Prompt will now start CHKDSK.

If the issue still persists, follow the method 3.

Method 3:

You may be facing the above issue due to the corrupted boot partition present on the computer. Repair your computer by creating a Windows 10 Bootable media (i.e. USB or DVD) using Media Creation Tool: and follow the steps below to check if the issue is resolved.

1. Insert the Windows installation disc in the disc drive or connect USB media and then start the computer.

2. Press a key when the message Press any key to boot from CD or DVD appears.

If your PC does not detect the media automatically.

1. During the restart process, read the screen for any instructions that explain how to interrupt normal startup and enter the basic input/output system (BIOS) setup utility. Most PCs use the F2, F10, ESC, or DEL key to begin the BIOS Setup.

2. Look for a tab in the BIOS Setup Utility that is labeled Boot Order, Boot Options, or Boot. Following the directions on the screen, use the arrow keys to go to the Boot Order, then press Enter.

3. Locate the CD, DVD, or USB flash drive (this might be called Removable Device) in the Boot list. Following the directions on the screen, use the arrow keys to move the drive up so that it appears first in the Boot list. Press Enter. The boot order sequence is now changed to boot from the CD, DVD, or USB flash drive.

4. Press F10 to save your changes and to exit the BIOS Setup Utility. Select Yes in the confirmation window. The PC will restart. Allow the PC to restart normally. The scan will take a few minutes and remove any malware that may be infecting your computer.

3. Select language, time, currency, keyboard or another input method and then click Next.

4. Click Repair your computer.

5. Click the operating system that you want to repair and then click Next.

6. On the Choose an option screen, select Troubleshoot. Select Advanced Options >Command Prompt.

7. Type the following command:

Bootrec /fixMBR and then press ENTER.

Hope the above information helps. Reply with necessary information and the result to help you further.

Thank you.

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Question Info

Last updated May 16, 2021 Views 28,169 Applies to: