If you find your boot device not found, you may want to look for methods to resolve it. Don’t worry, this guide will show you how to fix the no bootable device step by step.
Few experiences are as frustrating as a computer that refuses to start. While startup glitches are remarkably common, they range significantly in severity and root cause. Encountering a message like "boot device not found" often serves as a signal that your hardware configuration requires a minor adjustment rather than a total replacement.
It is important to remain calm. This specific error rarely suggests that your personal data has vanished or that a security breach has occurred. However, until the system successfully identifies a valid drive, you are effectively locked out of your workstation. Addressing this bottleneck is the only way to regain access to your files and applications.
The following guide outlines the necessary steps to diagnose and rectify a missing bootable device.
Technical malfunctions rarely occur at a convenient time. Typically, they strike during high-stakes moments—perhaps as you are finalizing a professional report, rushing to submit a university assignment, or simply trying to unwind with some online shopping. Seeing an error message instead of your desktop can be incredibly jarring.
If your screen displays the "No bootable devices found" notification, there is no need to panic. The solution to no boot disk has been detectedoften depends on identifying your system's partition style: MBR (Master Boot Record) or GPT (GUID Partition Table). Once you determine which architecture your disk uses, you can apply the specific corrective measures required to restore functionality.
By following the procedures detailed below, you can independently resolve this startup failure and return to your tasks. If you find these steps helpful, consider sharing this walkthrough with others who may be facing similar technical hurdles.
If your operating system disk uses the GPT partition style, you can try the following methods one by one to eliminate no bootable devices foundDell errors on your computer.
If your computer is trying to start from a drive that doesn't contain an operating system, you’ll likely see a "No bootable devices found" error. To fix this, you need to ensure your primary system hard drive is set as the first priority in your BIOS settings.
Here is how to adjust your boot order:
Step 1. Restart your computer. As it begins to power back on, repeatedly tap the BIOS entry key—usually F2, F10, F12, or Del (this varies by manufacturer). Continue tapping until the BIOS setup screen appears.
Step 2. Once inside the BIOS, use your keyboard's arrow keys to navigate to the Boot tab. Look for the "Boot Order" or "Boot Priority" list. Move your system’s primary hard drive to the top of the list (Position #1).
Step 3. Ensure the specific drive containing your OS (such as the GPT OS disk) is highlighted as the primary boot device. Press the designated key to Save and Exit (often F10).
Your computer will now restart automatically. If you see your system logo, the issue is resolved. If the no bootable device error persists, you may need to explore further hardware or software recovery options.
If your computer fails to load boot information from the GPT disk or encounters internal errors, a bootable repair tool is essential. AOMEI Partition Software allows you to create a bootable USB drive, enabling you to restart the malfunctioning system and repair the UEFI boot volume directly.
✍ Key features of the repair disk:
🔸 System recovery: Access your PC even when the operating system fails to load.
🔸 UEFI repair: Automatically fix common errors within the UEFI boot partition.
🔸 GPT compatibility: Specifically designed to handle boot issues on modern GPT-formatted disks.
To use this method, you will need a functioning computer to create the bootable USB and a drive with at least 8GB of space.
A safe and reliable disk partition management tool that helps you migrate OS to SSD or HDD, reorganize disk space, and improve overall PC performance.
Step 1. Install AOMEI Partition Software on a working PC and connect a USB drive with enough storage to this PC.
Step 2. Open this software and select the Boot Repair tool below the Recover section.
Step 3. Click the create a bootable disk option to create a WinPE Boot Repair USB drive.
Step 4. Plug the created drive into the non-booting computer, then enter the BIOS settings to change the boot order so that the computer boots from it. It will automatically load the Boot Repair tool and perform a scan of boot entries.
Step 5. Once the process completes, you will see all scan results, including system paths, system versions, and boot status. Select the repairable boot entries you want to repair and click the Repair button.
Step 6. Wait for the repair process to finish, then remove the bootable USB drive and boot the PC from the original system drive.
If your system disk uses the older MBR (Master Boot Record) partition style, the troubleshooting steps for a "no bootable device found" error differ from modern UEFI/GPT systems.
Here are the most effective solutions to resolve the system cannot find any bootable devicesissue on an MBR-based drive:
If the MBR (Master Boot Record) partition table on your system disk becomes corrupted, the BIOS will be unable to locate the boot instructions required to start your PC. Rebuilding the MBR is the most direct way to restore this connection.
While you can attempt this manually via the Command Prompt (CMD), the process is often complex and prone to user error. To simplify the laptop no bootable devicerepair, you can use AOMEI Partition Software, which features a dedicated "Rebuild MBR" tool designed to automate the fix.
Step 1. Install and launch AOMEI Partition Software. Select the SSD and right-click it to choose “Rebuild MBR”.
Step 2. Set the type of MBR in the pop-up window. (Choose a proper MBR type according to your operating system.)
Step 3. Click “Apply” on the toolbar to commit the Rebuild MBR operation.
If your computer is failing to boot with a "no boot device found" error, it is often because the primary partition—where your operating system lives—has been set to inactive. To fix this, you need to mark that partition as Active so the BIOS/UEFI knows where to look for the boot files.
Here is how to reactivate your partition using the Windows Recovery Environment:
Step 1. Insert your Windows installation media (USB or DVD) and restart your computer.Boot from the media (you may need to press F12 or Del to change the boot order).
Step 2. Select your language and keyboard preferences. Click Repair your computer in the bottom-left corner.
Step 3. The path varies slightly depending on your version of Windows:
>> Windows 10 / 11 / 8: Select Troubleshoot > Advanced options > Command Prompt.
>> Windows 7: Choose "Use recovery tools...", select your OS from the list, click Next, and then select Command Prompt.
Step 4. In the Command Prompt window, type the following commands one by one, pressing Enter after each:
diskpart — This launches the disk management utility.
list disk — Shows all physical drives.
select disk 0 — Replace "0" with the number of your primary hard drive.
list partition — Displays the partitions on that drive.
select partition 1 — Replace "1" with the number of your system/OS partition.
active — Marks the selected partition as active.
exit — Closes DiskPart.
If you are staring at a "No bootable device found" error, it usually means your BIOS is struggling to communicate with the hard drive. One of the most effective ways to diagnose and fix this is by using the built-in Windows utility, CHKDSK.
You can verify the health of your disk and attempt a repair by following these steps:
Step 1. Follow the steps in "Method 2" (typically via Windows Recovery Environment) to open the terminal.
Step 2. Execute the Repair Command: Type the following command and press Enter:
chkdsk c: /f /x /r
Seeing the error message "No bootable devices found" (or "system cannot find any bootable devices") means your computer's motherboard checked all its storage drives and couldn't find a piece of software it recognizes as an operating system (like Windows, Linux, or macOS).
Think of it like a librarian looking for a specific book. They know where the shelves are, but when they go to the section where the book should be, the shelf is either empty, the book is damaged, or they aren't allowed to touch it.
There are generally four main culprits when this screen appears:
1. Connection issues: The physical connection between your storage drive (SSD or HDD) and the motherboard might be loose. This is common if a laptop has been dropped or a desktop was recently moved.
2. Incorrect boot order: Computers follow a list of priorities for where to look for an OS. If the "Boot Order" in your BIOS/UEFI settings is set to look at a USB drive or a Disc Drive first—and one is plugged in but doesn't have an OS on it—the computer might stop there and give up.
3. BIOS/UEFI settings (Legacy vs. UEFI): Modern computers use UEFI, while older ones use Legacy (BIOS). If your settings were recently changed (for example, if Secure Boot was enabled or disabled), the motherboard might be looking for a "Legacy" operating system on a drive formatted for "UEFI", or vice versa.
4. Drive failure or corruption: The most serious cause is that the storage drive itself has failed mechanically, or the "Boot Loader" (the tiny piece of code that tells the computer how to start the OS) has become corrupted.
Encountering a "no bootable device" error is stressful but usually fixable. By identifying your disk’s architecture—GPT or MBR—you can apply targeted solutions like adjusting BIOS boot orders, rebuilding the Master Boot Record, or reactivating partitions via Command Prompt. Whether caused by loose connections or software corruption, following these diagnostic steps allows you to bypass hardware bottlenecks, safeguard your data, and restore your system to full functionality independently.