Reboot and Select Proper Boot Device - Easy Fix 100% Helpful

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Want to fix the Reboot and Select Proper Boot Device error on Windows? You might have tried to start your computer, but it won't allow your operating system to boot. 

Many Windows users have experienced this issue. This is a more extensive issue that we will show you how to easily and efficiently solve Reboot and Select Proper Boot Device errors on Windows. We will also explain the reasons why this problem happens so that it can be avoided.

Why it shows Reboot and Select Proper Boot Device?

When the system BIOS has some difficulty finding a bootable drive or other bootable devices, the "Reboot and Select Proper boot device" error will be shown. In another sense, you can't acknowledge the drive your operating system is installed on the BIOS chip on your computer's motherboard.

You will realize that your keyboard stops working and that error freezes your desktop. There are cases where the BIOS or drive of the system is working properly, but the error still appears. Probably a damaged OS or a corrupt boot volume is the reason. This could have been triggered by a virus assault. You might also see this 0xc00000e9 error while booting.

On the other hand, damaged registry files can occur which are updated by Windows or BIOS. There are many possible reasons why this error happens, but the issue can always be solved under any conditions.

Changing Boot Order to map right booting device

Follow these steps properly and fix this issue in 
  • Turn off your computer.
  • Press the Power button to boot it.
  • To enter the BIOS settings, click the appropriate button. The key depends on the computer brand you've got. The best way to consult your user manual is to use the F12, F2, ESC, F8 or Delete key.
  • Go to Boot Options once you are inside the BIOS Setup Utility. As the primary boot device, set the operating system drive. To move it to the top of the list, use the arrow key.
Reboot and Select Proper Boot Device
  • Save and restart your computer.

Check if motherboard is sensing boot device

As we stated, your computer's Operating system drive can cause the issue. So you first have to verify if your SDD or HDD is linked to your computer correctly. By entering the BIOS settings, you can easily and quickly do this. follow the steps below:

  • Shut down your computer.
  • To start it, press the Power button.
  • Press the appropriate button to enter the BIOS settings. Read the handbook of your computer motherboard maker to understand the key for the BIOS configuration. Usually, F12, F2, ESC, or delete key may be used.
Reboot and Select Proper Boot Device

  • Go to Main Settings or Standard CMOS Features after reaching the BIOS Setup Utility Window.
  • Check whether the SDD or HDD of your system is listed on this page.

It is probable that your HDD or SDD is not correctly linked to your computer if you know your system drive is not specified in the BIOS menu. The wires may be defective or your main storage device has stopped working.

In this situation, your computer should open the case and replace the new SATA cable. In order to ensure that all wires function correctly, you can also substitute the power connector for your storage device. It is better to find a specialist to assist yourself if you are not confident to do this on your own.

Fix using diskpart on Command Prompt

The error "Reboot and Select Proper Boot Device" can also occur when the active drive of your computer is not connected to the primary drive. By setting the active hard disk you can resolve this issue. The following are the steps:
  1. Insert your Windows installation disc into your computer.
  2. Reboot your device from the media you've just inserted and boot it.
  3. Select Troubleshoot once you are in the System Recovery Options window.
  4. Click Advanced Options under the Troubleshoot options.
  5. From the Advanced Options menu select Command Prompt.
  6. Type "diskpart" (no quotes) in the Command Prompt, then click Enter.
  7. Type the commands one at a time to ensure that after each command you press Enter.
    1. list partition
    2. select partition X
    3. active
Hope that the solutions here help you to fix the error "Reboot and Select Proper Boot Device". Read more about DiskPart commands on

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