Reboot And Select Proper Boot Device ERROR FIXED [2021]

Reboot and select proper boot device, any error with it, it is definitely a perfect nightmare, haunting different Windows Operating Systems versions, including Windows XP or Windows 8.1. This issue is not a problem with Windows 10, but for the ones who still have not yet done an updated version, they are highly vulnerable to this concern. The issue, it either comes up out of nowhere, or it is generally caused due to system files corruption or due to the faulty hard drive or because of the faulty hardware that failed, etc.

Either way, no matter what the reason is, the error shows up, and it affects the users. When the user tries booting their computer, the error keeps showing up in all of the cases and this, it doesn’t allow them to boot in the operating system no matter how many times they try doing it. Well, at least the users have many solutions that can be used upon, and these solutions are worth giving a shot. So, do not wait; just select proper boot device solution and get the issue corrected.

Causes of the Error:

Reboot and then select proper boot device error, which means that the basic input or output system (BIOS) of the computer is unable to find the boot device which contains the operating system. It is therefore prompting the user to reboot and select proper boot device or insert boot media. There are different causes that prompt the error message coming up. It can be either the physical issue or the software problem.

  1. Physical issues

The physical issues can mean that the boot disk, it is not properly connected with the hardware of the computer that has the boot disk because of,

  • Failure or the damage or
  • The faulty cable or
  • The damaged slot or
  • SATA or
  • The dead hard drive

Either of the reasons can become the concern or the physical issues.

  1. Software issues

It includes,

  • Inactive boot partition or
  • Damaged MBR (Master Boot Record) or the corrupted MBR or
  • Wrong boot sequence in BIOS or
  • Boot files that are corrupted or lost or
  • Corrupted OS

In order to boot the BIOS of the computer, one will be required to restart their computer, reboot and select proper boot device or insert boot media in selected boot device and press a key (ESC, F12, F10, F2, DEL) which will allow one to enter the BIOS system of the computer. The keys are visible on the post-screen and can even be found on the manual, which comes with the motherboard of the computer. Make sure to press the key until the time the computer finally boots to the BIOS system, and then make sure to use any one of the solutions that have been discussed below for solving the problem.

Fixing “Reboot and select proper Boot Device” on Windows:

Check the Hard Drive Disk power cable

A frayed, broken, or improper wire connection causes the hard disk not to be detected by the computer. So, one must assure you there isn’t a wiring concern, and to do it, follow the below-mentioned steps.

  • Shut down the computer and then open it.
  • Look for the power cable that runs between the hard drive to the motherboard and see if its damaged or not connected.
  • If the connection is okay, remove the wire from the computer and try on another one.
  • On the test computer, if an error still occurs, make sure to replace the power cable, reattach it properly and start using it.

Clean the RAM

Uncleaned/removed RAM can be a cause of the error. In order to clean it, follow the steps.

  • Shut down the computer.
  • Pull out the sideboard of the computer by removing the screw from the bottom and tower of the laptop to find the RAM location.
  • Next, unlock clamps that keep RAM in place and then remove it.
  • Clean the dust-off RAM using a soft cloth and then reposition it all back in respective slots.
  • Then clamp it to the place and close the computer.
  • Reboot and see if the error still exists.

Check whether BIOS detects Boot drive

  • Start with reboot/boot the computer, and then to go to the computer BIOS, press the post screen designated key.
  • On the screen will be a visible list of all devices which are connected with BIOS. It includes hard disk drives, fans, or any other hardware connected, including CD/DVD drive.
  • If the hard disk drive isn’t listed, shut down the computer.
  • Next, open the computer and connect the hard disk drive with the other SATA slot or use any other SATA cable for connecting the hard disk drive with the other SATA slot in the motherboard.
  • Reboot into the BIOS and check if now the hard disk drive is being detected. If it is detected, it was either the cable or the SATA port causing trouble.
  • But if the drive is still not detected in BIOS, it is very likely that the boot device is either damaged, corrupted, dead, or failed.

Boot Order- Check it

  • Restart the computer.
  • Press the important key for opening the BIOS menu.
  • The key, it is dependent on the computer model and manufacturer. It is listed on the 1st-screen and can be either ESC, F2, F10, F12, F8, DEL. If there are multiple keys, find the one who can open the BIOS, set up, or the BIOS menu. The boot order, it gets changed from here.
  • Then go to the Boot tab.
  • Change boot order and then list the computer HDD first.
  • Save the setting and then restart the computer.

Disable/Enable- Legacy Boot

In some of the cases, the BIOS comes with the legacy boot feature. It can cause the reboot and select proper boot device windows 10 error. Well, this issue is simple to correct, and with Disable/Enable, one can fix the issue message.

  • Restart the computer and then enter BIOS.
  • Search for the legacy boot option. One needs to get through all of the tabs or settings in BIOS for finding it.
  • Once it is found, it can be disabled or enabled. If the same is disabled, enable the same.
  • Make sure to save the changes before exiting BIOS.
  • Then restart the computer.


How to select the boot device in the case of windows 10?

One can have access to the boot menu by system rebooting. Make sure to check whether or not all of the installed devices are displayed in the boot menu. Next, select the drive wherein the operating system is installed.

UEFI boot mode- what is it?

UEFI, it stands for Unified Extensible Firmware Interface. It is the small operating system that runs PC’s firmware. It is much more capable than the BIOS.

Which is the proper way of booting Windows 10?

Before trying to reboot and select proper boot device windows 10, one needs to learn how to properly boot BIOS. Just make sure to turn off the computer before booting it. While computer boots, one needs to learn the use of proper buttons for entering the BIOS settings. Button varies, and one can try using the keys like DEL, ESC, F2, or F12.

Final Verdict:

If any of the above-said solutions are not working, then try to update the SATA drivers using Safe mode. Well, if this too doesn’t work, just replace the CMOS battery (memory system of motherboard that has errors) of the motherboard. One can even be required to completely reinstall the windows if one suspects that OS has been corrupted or if the boot drive of the hard disk is damaged or dead or corrupted. Follow what suits and correct the error on time.

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