6 Ways to Overcome Reboot and Select Proper Boot Device Errors

The reboot and select proper boot device error message can appear when the laptop or computer you are using is having problems.

This is usually caused by an error in the BIOS settings or a problem with the operating system.

To fix this, you can try some of the solutions listed below.

Causes of Reboot and Select Proper Boot Device

Before proceeding to how to fix it, you should first understand what causes the reboot message and select proper boot device to appear.

This problem can arise because it is caused by an error in hardware or software.

Hardware Problem

  • BIOS can't detect hard drive
  • Problem with SATA cable or slot
  • Hard disk is damaged
  • The CMOS battery is not working properly

Software Problem

  • Boot priority order error in BIOS
  • Error setting boot mode in BIOS
  • Problems with the operating system (especially Windows)

Of course, there are many more causes that can bring up this error message. 

However, the causes above are the most commonly found and most often experienced, especially for Windows 10, 8 or 7 users. 

How to Overcome Reboot and Select Proper Boot Device

Here are some ways you can try to resolve the error message "Reboot and Select Proper Boot Device".


Most of the methods below will be BIOS related.

Therefore, please learn first how to enter the BIOS on a laptop or PC if you have never done it before. 

1. Choose the Correct Boot Priority

Error message like this often appear when the boot sequence in the BIOS of a laptop or PC is wrong.

If the order is wrong, then the BIOS cannot find the right boot device to run the system on the laptop/PC. 

To fix this, you can select the correct boot priority with the following steps:

  1. Turn off and on PC/laptop
  2. Enter BIOS
  3. Go to Boot tab
  4. Make sure the hard disk you are using is in the first order
  5. If not, please change the order (up or down) by pressing F6/F5 or +/- keys (each BIOS type may be different)
  6. After the hard disk is in first place, save it by pressing the F10 key on the keyboard
  7. Select Yes to apply changes 
  8. Wait until the laptop/PC restarts
  9. If successful, then the error message reboot and select proper boot no longer appears

Boot priority is correct but why is there still an error?

If so, please try another method below.

2. Turn off Legacy Boot

The "reboot and select proper boot device" problem can also arise because the legacy boot setting on the laptop is enabled. 

This usually happens on laptops that have a UEFI type. 

To fix this, please turn off legacy boot made in the following way:

  1. Turn off and turn on the laptop
  2. Enter BIOS
  3. Look for the setting that says UEFI or Legacy
  4. Select UEFI Only
  5. Save by pressing the F10 key
  6. Wait until the laptop restarts itself

3. Reset BIOS Settings 

The select proper boot device error message can also appear when you accidentally change the settings in the BIOS.

To fix this, please restore the BIOS default settings in the following way:

  1. Turn off and on PC/laptop
  2. Enter BIOS
  3. Go to the Exit tab
  4. Select Load Setup Defaults
  5. Select Yes to confirm
  6. Press F10 to exit BIOS
  7. Wait until your PC/Laptop restarts

4. Repair Windows

In addition to BIOS settings, error messages like this can also appear due to problems with the operating system used.

If you are a Windows user, you can try the method below to fix the reboot and select proper boot problem.

  1. Prepare Bootable Flashdisk Windows 10
  2. Plug in a USB Flashdisk that already has a bootable
  3. Turn on PC/laptop
  4. Enter BIOS
  5. Go to the Boot tab then set it to boot using a USB Drive (Removable Device)
  6. Press F10
  7. Wait until it boots
  8. After Windows Setup appears, select Repair your computer
  9. Click Troubleshoot > Advanced Options > Startup Repair
  10. Wait until the process is complete
  11. If the error message still appears, lease repeat from step 8
  12. Click Troubleshoot > Advanced Options > Command Prompt
  13. Run the below CMD commands one by one sequentially (bootrec /fixmbr , bootrec /fixboot , bootrec /scanos , bootrec /rebuildbcd)
  14. If you have typed exit and press Enter then restart the laptop/PC
  15. If successful, then the message select proper boot device should no longer appear

You can also use this method when you encounter the Your PC ran into a problem error on Windows 10

5. Reinstall Windows

If you have followed the method above but the error message still appears, it is possible that there is a lot of corrupt data on your Windows operating system.

If so, you inevitably have to reinstall Windows.

You can try reinstalling yourself or ask a friend for help if you haven't done it before.

If you want to reinstall yourself, make sure you have the latest Windows 10 ISO file.

Or if in doubt, you can ask for a re-install by coming to the nearest laptop service place.

6. Replace the CMOS Battery

Another cause that can cause an error to select proper boot device is damage to the CMOS battery.

It could be that the PC or laptop you are using is old enough, so the CMOS battery in it is not working properly.

As an alternative to the five methods above, you can reset the CMOS battery or replace it with a new one at the same time.

To reset it, you need to disassemble your PC or laptop in the following way:

  1. Remove the PC or laptop case
  2. Look for the CMOS battery on the Motherboard
  3. Gently remove the CMOS battery
  4. Press and hold the Power button for 10 seconds
  5. Replace the CMOS battery, it would be better if you all replace it with a new one.
  6. Restart your PC or laptop

If it is true the cause is the CMOS battery, the error message should no longer appear and you can log into Windows normally again.

Well, those are some ways to solve reboot and select proper boot device that you can try.