Fix Disk Boot Failure - Insert System Disk and Press Enter in Windows 10

Roxanne updated on Feb 22, 2020 to Resource | How-to Articles


The disk boot failure is an error that occurs during the startup process of the computer. Generally, it may result from a faulty BIOS boot order, corrupted OS, or damaged boot hard drive. Each possible cause has its corresponding fixes. If you find there is data loss on your computer after the repair, you can use EaseUS Data Recovery Wizard to recover your files.

On this page, we provide 3 fixes to help you remove Windows Disk Boot Failure error and help you restore lost data with reliable file recovery software. Follow to remove this error and make your computer work again:

Workable Solutions Step-by-step Troubleshooting
Fix 1. Check Boot Order Enter BIOS > Go to "Boot" > Set the system disk in the first option > Save changes...Full steps
Fix 2. Repair Operating System Boot computer from installation disk > Click "Net" in Windows Setup > "Repair your computer"...Full steps
Fix 3. Fix System Disk Run CHKDSK to check system disk > Fix unrecognizable system disk...Full steps
Extra Tip. Recover Data For the lost data on problematic disk, run EaseUS Data Recovery Wizard > Scan and recover...Full steps

Overview of the Disk Boot Failure

Disk boot failure - insert system disk and press enter

The disk boot failure, or more specifically speaking, "DISK BOOT FAILURE - INSERT SYSTEM DISK AND PRESS ENTER", is an error that indicates Windows couldn't load correctly. As you can see from the error message, it asks you to insert a system disk, which means that the disk boot failure occurs because BIOS is unable to find a bootable drive to start up the computer during the startup process.

Error Explanation

The boot process of any computer generally includes the following steps:

  • Power on
  • Power-on self-test (POST)
  • Find the boot device
  • Load the operating system
  • Transfer control to the operating system

Actually, these steps always go unnoticedly and quickly. However, if there are any issues during this startup process, you will encounter problems like the one in discussion. For example, if BIOS fails to load the operating system, you may be stuck at a screen saying "Windows is loading files". And if BIOS couldn't find a boot device, you will see the error message: DISK BOOT FAILURE - INSERT SYSTEM DISK AND PRESS ENTER.


The disk boot failure appears when there is no boot device found. Why can't the BIOS locate your boot disk? There are three kinds of possibilities:

  • Incorrect Boot Order in BIOS: A device that doesn't have the OS ranks first in the boot sequence
  • Damaged operating system: The operating system is corrupted and BOIS can't recognize it
  • Corrupted system disk: The system hard drive is damaged, unreadable, or unrecognizable

The disk boot failure is an upsetting issue since it disallows you to use your computer for work, study, recreation, and more. If you couldn't find a way to fix the disk boot failure, it will finally result in some other terrible problems like the black or blue screen of death, computer freezing randomly, system crash, etc. Therefore, carry out the fixes as soon as possible to eliminate your worries.

3 Fixes for Disk Boot Failure - Insert System Disk and Press Enter in Windows 10

Based on the potential causes of the disk boot failure, you can follow the solutions below to get rid of the error.

Instead of fixing the disk boot failure, you may only want to rescue the data on your computer. If so, you can directly create a bootable USB with EaseUS hard drive recovery software, boot your computer from the USB, and then recover all your files to an external storage device. Refer to the article on how to create a bootable media of EaseUS Data Recovery Wizard for Windows for detailed steps.

Method 1. Ensure the Boot Order is Correct

If some other device, like a USB, has a higher priority than your system disk and you have a USB without OS connected to your computer, you can simply remove the external storage device and let BIOS boot from your system disk. If not, change the boot order in BIOS and make your system disk as the first option. (System disk doesn't show up in BIOS? Move to method 3 for solutions.)

Step 1. Restart your computer. During the process, press the BIOS key (the BIOS key varies depending on the brand of your computer) to enter BIOS.

Step 2. Use the arrow keys to switch to the "Boot" tab.

Step 3. Use the arrow key to change the order and make sure your system disk is in the first option.

Step 4. Save your settings and exit BIOS.

Change boot order in BIOS

Method 2. Repair Corrupted Operating System

Does the boot disk failure persist after setting the boot order correctly? If so, it's possible that the operating system is corrupted or the system disk is damaged. Since repairing the operating system is much easier than fix the hard drive, let's see how to repair the OS first. (You need a Windows 10 installation media using this method. If you don't have the CD/DVD or USB boot drive, learn how to burn ISO to USB to create a bootable media first.)

Step 1. Boot your computer from the installation CD/DVD/USB.

Step 2. In the Windows Setup window, click "Next".

Step 3. In the screen, choose "Repair your computer" > "Troubleshoot" and then you will see the Advanced options.

Step 4. Among these options, choose "Startup Repair" first. (You may see the message "Startup Repair cannot repair this computer automatically". Refer to the related article for fixes.) If it doesn't work, try "System Restore" instead. 

Repair OS

Method 3. Fix the Damaged System Disk

Does your system disk show up in the BIOS boot order? If not, your hard drive may be unrecognizable due to disk errors like bad sectors. Even if the disk can be detected by BIOS, there may be problems with it. To troubleshoot the disk issues, you'd better take the system drive out and connect it to another functional computer. (These operations require specialty. Don't mind sending your computer for professional repair.)

If you have successfully removed the system disk from the computer which suffered from the disk boot failure, see what you can do with it.

Option 1. Run CHKDSK If the Disk is Detectable

Running CHKDSK is able to find and repair disk errors. When you can't specify what the cause is, running CHKDSK is a good choice to try. For a detailed guide, read the article about how to remove bad sectors using CMD.

Option 2. Fix Unrecognizable System Disk

Hard drive not showing up/recognized is one of the commonest issues that may occur on your computer. The causes of the issue include outdated device driver, conflict drive letter, physical corruptions, and more. In the article about hard drive not recognized, we have presented all the workable solutions. Don't hesitate to apply the fixes to have a try.

These are all the solutions to fix the disk boot failure issue caused by all the typical reasons. I hope at least one of them is helpful! If the disk boot failure still exists after all the fixes, you should consider reinstalling OS or sending your computer for manual repair.

Do You Need Specialized Services for System Boot Issues?
EaseUS also provides 1-on-1 remote assistance to fix the boot issue. If the solution above does not work for you, please contact our professionals via Email or LiveChat in this page. To ensure our professional assistance work, you are suggested to connect the unbootable system drive to a healthy computer when getting connected with us.

Extra Tip: Recover Data After Fixing the Disk Boot Failure

Data loss may occur on your hard drive after the repair. If you lose any important files, you can use the trustworthy data recovery software - EaseUS Data Recovery Wizard to retrieve them.

Step 1. Select a location and start scanning.

Launch EaseUS Data Recovery Wizard, and hover on the partition where you lost data, be it a hard disk drive, external disk, USB, or SD card, then click "Scan".

select a location and click scan

Step 2. Preview and select the files you want to recover.

When the scanning has finished, select the data you want to recover. Double-click the file to check its content if you need to.

Choose files to recover

Step 3. Recover lost data.

After choosing the data, click "Recover" and choose a location on another drive to save the files.

Recover lost data

The Bottom Line

The disk boot failure is largely caused by a faulty boot order in most of the cases. And it's the simplest situation among the three possibilities. Boot issues like this always trigger anxiety in the mind of the user who is troubled by them. Luckily, by knowing how to cope with it, you can greatly weaken this emotion and get the problem solved by yourself.


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Frequently Asked Questions

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If the files with original file names and folder structures cannot be opened, one possible reason is the corrupted directory info. There is still a chance to recover the data content with the RAW Recovery method in our software.

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It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

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