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The Reboot and Select Proper Boot Device error message pops up when a motherboard can’t connect to the hard drive that contains the operating system.

But there’s no need to bring in your PC for repairs just yet. In this post, you’ll learn some of the ways you can troubleshoot the issue on your own.

Check The Cables

You should first check the cables to see if they`ve been dislodged from either the motherboard or the hard drive.

If the PC case has been moved recently, it could be a contributing factor. Inspect the cable for signs of damage. If there appears to be no problem with the cables or the connection, you will need to investigate further.

Enter BIOS/UEFI

The BIOS is a software that lives in your motherboard. Simply put, it’s the program that runs the whole show – from your operating system down to all the hardware components.

If your motherboard isn’t detecting the hard drive, the BIOS (or UEFI in some cases) settings could provide answers as to why. How to Enter BIOS To access BIOS, go to Windows Settings > Update & Security > Recovery > Advanced Startup.

Click Restart Now. This will prompt your PC to reboot. But instead of bringing you to the Windows login page as normal, you will be presented instead with several options on how you’d like to proceed.

Go to Troubleshoot > Advanced Options > UEFI Firmware Settings.