No Bootable Device Error - What Does It Mean, What Cause the Error, How to Fix | All Answers Here!

Some users have run into an error when they start computers that says PXE-MOF: Exiting PXE ROM. No bootable device, insert boot disk and press any key. The reasons for no bootable device error can be various. This post displays several fixes to solve this error.

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Table of Contents

What Does It Mean When It Says No Bootable Device

Some users have reported an error when starting Acer, Dell, or HP computers that says "PXE-MOF: Exiting PXE ROM. No bootable device, insert boot disk and press any key".

no bootable device error

No Bootable Device error means that the Windows operating system can't find a storage device that contains necessary boot files and drives to boot the system. The storage hardware can be an HDD, SSD, DVD, CD-ROM drive, or USB flash drive.

Ordinary users may be frightened and have no idea when no bootable device error pops up on the screen, in which case not only can you not open the computer, but you may also lose data if you don't solve it properly. But don't fret. You can check out this tutorial to fix no bootable device issue without data loss.

Workable Solutions Step-by-step Troubleshooting
Check Hard Drive Connection Power off your laptop or PC completely. Unplug the power cord...Full steps
Set the Drive as Boot Device Restart your computer press the F10 key repeatedly to enter the BIOS...Full steps
Fix Corrupted MBR Launch EaseUS Partition Master, click "WinPE Creator" on the toolbar...Full steps
Repair System Files Put the Windows installation media drive or CD into your computer...Full steps
Fix File System Boot your computer from the Windows installation media...Full steps

What Cause No Bootable Device Error on Windows 10

No bootable device will occur when the computer cannot find the device or file that boots the system. Some possible reasons for this issue are:

  • The bootable hard drive or partition is not detected.
  • Incorrect boot order, the computer is set to boot from an unbootable device.
  • The MBR (Master Boot Record) is damaged.
  • The hard drive gets corrupted.
  • The operating system file is corrupted.

Recover Data from a Laptop/PC That Won't Boot At First

As the causes of no bootable device vary, you may need to try different solutions to fix the error. But if a hard disk or system problem causes the computer to fail to boot, things can get tricky. To avoid the risk of data loss during the problem fixing, we strongly suggest that you export back up your data first.

How to recover data from a computer that won't turn on? Use EaseUS Data Recovery Wizard, a world-famous data recovery tool that enables you to create a bootable USB drive and restore data in the WinPE environment.

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You can use this advanced data recovery software to recover permanently deleted files from HDD, SSD, USB flash drive, SD card, or pen drive on Windows 10 and Mac computers.

Step 1. Create a bootable disk

Prepare an empty USB. If you have important data on it, copy the data to another device. When you create a bootable disk, the data on the USB will be erased. EaseUS Data Recovery Wizard WinPE Edition will help you create a bootable disk.

Connect the USB drive to PC, launch EaseUS Data Recovery Wizard WinPE Edition. Select the USB drive and click "Create" to create a bootable disk.

create a bootable disk with easeus

Step 2. Boot from the bootable USB

Connect the bootable disk to PC that won't boot and change your computer boot sequence in BIOS. For most users, it works well when they restart their computer and press F2 at the same time to enter BIOS. Set to boot the PC from "Removable Devices" (bootable USB disk) or "CD-ROM Drive" (bootable CD/DVD) beyond Hard Drive. Press "F10" to save and exit.

Step 3. Recover files/data from a PC/laptop hard drive that won't boot

When you boot from the USB, you can run EaseUS Data Recovery Wizard from the WinPE bootable disk. Select the drive you want to scan to find all your lost files. 

selet the drive

Click "Scan" to start the scanning process.

let the software scan the drive

Recover data from the computer or laptop. After the scan completed, you can preview all recoverable files, select the targeted files, and click the "Recover" button to restore your files. You'd better save all of the recovered data to another place to avoid data overwriting.

recover data from the computer

After getting back the important files, you can rest assured and boldly use the following methods to solve the no bootable device error.

Fix 1. Check Hard Drive Connection to Fix No Bootable Device 

In the beginning, you should make sure the bootable hard drive is connected to your computer properly. If the connection between the system disk and the computer is loose, the computer may not be able to detect the bootable hard drive, and you will come across no bootable device issue.

Note: It's easy to check the hardware connection on desktop computers. But dissembling a laptop is quite complicated. We strongly recommend that you seek professional help.

Step 1. Power off your laptop or PC completely.

Step 2. Unplug the power cord and open up the case.

Step 3. Check or change a SATA cable. Make sure that the connection is set up properly between the motherboard and HDD or SSD.  

Step 4. Reassemble your computer and restart it to see if it can start normally.

Fix 2. Set the Bootable Hard Drive as Boot Device

If your computer is set to boot from an unbootable disk or device, the no bootable device problem will definitely appear. You can change the boot order in BIOS with the steps below.

Related reading: UEFI vs. BIOS: What's the Difference and Which is Better

Step 1. Restart your computer press the F10 key repeatedly to enter the BIOS setup menu. You may also press ESC, F1, F2, or F8 instead of F10 referring to the screen message.  

Step 2. Press the right arrow key on your keyboard until the Boot tab is opened.

Step 3. Press + or - to move Hard Drive to the top of the boot order list

Step 4. Press F10 to save and exit. Then, restart your computer.

Set Hard Drive as Boot Device

Fix 3. Fix Corrupted MBR to Solve No Bootable Device Error

MBR stands for Master Boot Record and is the first sector that a PC must-read when it opens to access a hard disk. If the MBR is corrupted or damaged due to a virus attack, power outage, or bad sectors, you may have the no bootable devices found error.

You can easily fix the corrupted MBR by using EaseUS Partition Master, an advanced disk management tool. It can manage your hard disk in every way, such as resize/move partition to solve low disk space, merge partitions, create/delete/format partition, clone disk, wipe data, and disk/partition conversion.

Download this Windows 10 disk partitioning tool to repair corrupted MBR with step-by-step guides.

Step 1. Create a WinPE bootable disk

  • Launch EaseUS Partition Master, click "WinPE Creator" on the toolbar. Select to create the bootable disk on a USB drive. If your computer has a CD/DVD drive, you can also create the bootable disk to CD/DVD.
  • Click "Proceed" to finish the process.
create a bootable disk

Step 2. Boot EaseUS Partition Master Bootable USB

  • Connect the bootable USB or CD/DVD to your PC. 
  • Press F2 or Del when you restart the computer to enter the BIOS screen. Set and boot your computer from "Removable Devices" or "CD-ROM Drive". And then EaseUS Partition Master will run automatically.
rebuild MBR

Step 3. Rebuild MBR

  • Right-click the disk whose MBR is damaged. Choose "Rebuild MBR" to continue.
  • Select the type of MBR with the current operating system. Then, click "OK".
rebuild MBR
  • Click the "Execute Operation" button at the top-left corner and click "Apply" to build the MBR. After that, your computer can boot normally again.
rebuild MBR

Fix 4. Repair System Files with Installation Media

You may get the no bootable device error when the system files on the hard drive are corrupted. You can try fixing the file with the following method to see if this addresses the issue.

Step 1. Put the Windows installation media drive or CD into your computer and boot from it with the way in Fix 2.

Step 2. Choose the language and region, and then click "Repair your computer".

repair windows problem

Step 3. For Windows 10 users, select "Troubleshoot > Advanced options > Command Prompt".

run cmd

 

For Windows 7 users, on the System Recovery Options screen, choose "Use recovery tools that can help fix problems starting Windows... > Command Prompt".

run CMD in Windows 7

Step 4. In Command Prompt, type the SFC command lines and press Enter after each. The sfc /scannow command scans the integrity of all protected operating system files and replaces incorrect, corrupted, changed, or damaged versions with the correct versions where possible.

sfc /scannow /offbootdir=c:\ /offwindir=d:\windows

C is the system drive. You can change the drive letter according to your needs.

Fix 5. Fix File System on the Bootable Hard Drive

If the file system of the boot disk is damaged, the hard drive cannot start normally and displays no bootable device error. You can try to repair the corrupted file system with the CHKDSK command.

If you are unfamiliar with CMD and don't feel confident about using it, you can apply a simple CHKDSK alternative - EaseUS partition manager to check and repair hard disk errors in simple clicks. 

Step 1. Boot your computer from the Windows installation media with the ways above.

Step 2. Access the Command Prompt. Enter the following command and press Enter.

chkdsk E: /f /r /x ("E" means the drive letter of the partition you want to repair, you can replace it).

Step 3. Wait for the process to complete.

repair file system

Final Words

No bootable device error on Acer, HP, Dell, and other computers is rather annoying. This article covers the most five effective solutions to help you resolve the problem.

You can first check the hard drive connected to make sure that the bootable hard drive can be detected by your computer. Then, set the boot order in BIOS, fix corrupted MBR, system files, and bad sectors with Windows installation CD.

Important: When your computer fails to boot, you need to rescue lost data immediately before taking any action to resolve the problem. Use EaseUS data recovery software to restore files efficiently.

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Updated by Brithny

Brithny is a technology enthusiast, aiming to make readers' tech life easy and enjoyable. She loves exploring new technologies and writing technical how-to tips. On her spare time, she loves sharing things about her favorite singer - Taylor Swift on her Facebook or Twitter.

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Written by Cedric

Cedric Grantham is one of the senior editors of EaseUS who lives and works in Chengdu, China. He mainly writes articles about data recovery tutorials on PC and Mac and how-to tips for partition management. He always keeps an eye on new releases and likes various electronic products.

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