In this Article (Reboot and Select Proper Boot Device we read about):

1)Introduction about:-Reboot and Select Proper Boot Device

2)Reasons for Reboot and Select Proper Boot Device

3)How to get into BIOS for Reboot and Select Proper Boot Device

4)Quick ways to fix reboot and select proper boot device

5)Conclusion for Reboot and Select Proper Boot Device

Introduction and The Problem You Faced

Your personal computer was working fine yesterday and when you power on your personal computer today you see that reboot and select the proper boot drive. We will give you an easy fix and tell you what is the cause of this problem. The reason is why you see this reboot and select a proper boot drive is because your system was unable to detect your boot drive, where you installed your windows or it detected other drives you have in your personal computer as a boot drive where it should not.

reboot and select proper boot device

After seeing “reboot and select proper boot device” on a black screen, press ctrl, alt, delete on your keyboard or simply press the reset button on your chassis to restart your personal computer, while it is loading continuously press delete so that you could enter bios. Once we are in the bios, go to boot, and under the boot priorities.

boot device priority
Boot device priority

Now select the drive where you installed windows for example choose Kingston which is your m.2 and that is where you install the window, your Bios may be different than the one mentioned in this example,

Boot drive

Depending on the motherboard you got but the idea of the boot priority settings are the same. After selecting the proper boot drive, just save the settings and exit the bios. Your personal computer will restart and will boot to the drive you have chosen in the bios.

If the drive you selected was correct then you are good to go, if not just redo the process again and choose the correct drive this time.

Other possible reasons for this problem and its solution :

Your boot drive is not plugged in all the way, the data and the power cable from your power supply for both SSD and hard drive. For m.2  once it is damaged, it will not go anywhere so it is very rare for m.2 to have been the cause of this problem. If you are using m.2 or you have just recently installed a new drive in your personal computer then eventually your motherboard detected it as a boot drive, this happens at times and there is no need to worry because nothing is broken, you just need to set your SSD or m2 as a priority.

Another reason your personal computer is not booting is that the boot drive order is incorrect, now you will need to go to the BIOS to change the boot settings, turn on the computer and keep pressing the BIOS setup key for your computer, this is often the delete key but it can also be the F1, F2, F10 or escape key. On some computers, you can see the key mentioned when your computer starts booting. You can also google the BIOS key for the model number of your computer. Once in the BIOS, try first to load optimized default settings after that save and exit setup. 

If it does not boot, go back into the BIOS and find the boot menu tab

boot menu tab

Now, look at the boot priority list of your Windows boot manager it should be at the top. Now rearrange the order to put the correct drive at the top, remember to save and exit once complete.

If that works but then stops next time you power on your computer then you may need to replace the battery of your computer. 

If no hard drive or SSD shows up in your boot order, the drive SATA cable could be faulty or not connected properly. Make sure the power and SATA cable is connected. You can also try switching the power and SATA cable connecter if there is another available. Go back into the BIOS and check the drives detected in the boot priority menu, if no hard drive or SSD is detected, your drive may have failed, in that case, the drive needs to be replaced with a new one and a new Windows installation.

sata cable
Sata cable

To fix the problem of your computer no boot device error or no bootable device found, any sort of error like that and it is showing trying to boot up but it can not find anything to boot off, you can fix that by trying these couple of things:

The first thing is to unplug any extended devices, any flash drives or CDs, unplug anything external from your computer, what could be happening is that it could be getting confused and trying to boot off of these devices so take those and try to restart your computer.

Extended devices
some of extended devices

Another quick thing you can try is to go to the hard drive and then receipt it, that means you unplug it and then you plug it back in making sure that it is a secure correct connection and then try to do it up again. Sometimes a hard drive gets loose, maybe you hit your computer or are at a fault so sometimes it just gets loose and gives you that error.

How to get into BIOS for Reboot and Select Proper Boot Device?

To get into BIOS, press power and then start tapping on F2, if F2 does not work for you try  F1, and if neither works try your other function keys or try to google your specific model. Sometimes AC switches up the function key it uses, so press power and start tapping on F2 right away and you will get your BIOS menu. 

Bios menu

All BIOS does not look the same, it is based on the year of computer and end model but all the information you need will be there. The first thing to look for is the system date and time, which are usually found on the main tab. If your system date and time are wrong, correct them, save and exit, try restarting your computer. 

The next configuration that we are going to change with your old or CSM or the UEFI configuration arrow to boot and there is UEFI and again we are looking for UEFI, LEGACY, or CSM. Legacy and CSM are almost the same things but basically what we are doing here is that we are switching between them. If you see UEFI, change to legacy (CSM), if you see legacy (CSM), change to UEFI. The way to do this varies in different BIOS systems. Highlight it, press enter and if UEFI is enabled, then disable it and press enter.

csm configuration
CSM configuration

Some computers have drop-down menus that allow you to select Legacy or CSM but change that. If you cannot switch to the legacy version, you may need to change other settings. Sometimes it is necessary to go to the Security tab and disable Secure Safe Boot. For some computers, you will also need to take a second step and enable the legacy boot option. So now you will need to switch between these two, save, exit, and restart your computer. If this repairs your computer, you have identified the BIOS as the problem.

If it does not fix your computer then you need to diagnose your hardware or your hard drive or your operating system. Now use the diagnostic software that you have to diagnose the hard drive.

Some computers do not have built-in diagnostic software so you have to test for a hard drive and the operating system at the same time. At this point, if it is not working then you can try to reinstall windows. If you have installed it and it works fine then you have identified the operating system as the problem and you fixed it.

If that does not work for Reboot and Select Proper Boot Device and it keeps airing out or it won’t install correctly then you have identified most likely your hard drive as the problem.

Also read:- How to Unzip files on Windows and Linux

Quick ways to fix reboot and select proper boot device or insert boot media to selected boot device (summarized):

1. Press start your computer and press or hold ctrl + alt + delete.

2. Press start and press F12 for selection of other windows boot managers. Try selecting all windows to boot managers.

3. Press start and press delete to BIOS access for default BIOS settings.

4. Press start and press delete to BIO access for boot priorities.

5. Unplug the power cable, open the left side cover, remove the CMOS battery, and press and hold the power button for five seconds to reset all BIOS settings.

6. Unplug the power cable, open the front cover, reconnect,  check the power and SATA cable.

7. Unplug the power cable and replace the SATA cable.

8. Unplug the power cable and replace the new HDD or SDD with OS installed.

9. Power ON and press delete repeatedly, the default setting, Make sure your WBM boot and make sure your OS hard disk boot, save and exit

11. Change storage boot option control. Power ON and press delete repeatedly, try UEFI or disabled then make sure enabled, save, and exit.

12. Change SATA cable and connect other SATA ports, make sure WBM boots.

13. Use CMD advanced option to create boot files. Power ON and press delete repeatedly and move your USB bootable to boot.

14. CMD advanced option create EFI. Go to the advanced option and select CMB.

Conclusion:

Try all the methods mentioned above (reboot and select proper boot device). Always make sure to back up your files, for example, use OneDrive to preserve your most important documents. If all these methods do not work then please try to contact a computer expert available near you. You can also check out how to install windows on your computer.  All these methods possibly work based on the reason your computer is not working.

Also read:- Windows 10 startup program