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Home Computer Tutorials Troubleshooting How to fix 'No bootable device found'

How to fix 'No bootable device found'

Jul 26, 2025 am 07:13 AM
Startup issues 設(shè)備故障

First, check the boot order in BIOS/UEFI and set the primary drive as the first boot device; 2. Verify the drive is detected in the BIOS under storage settings, and if not, inspect for loose cables, failed drive, or incorrect SATA mode; 3. If the drive is detected but won’t boot, use a Windows installation USB to access Repair your computer and run Startup Repair or manually repair the bootloader using bootrec commands; 4. Test for drive failure by checking for unusual sounds or using a USB-to-SATA adapter on another computer to confirm detection; 5. Ensure the SATA operation mode (AHCI, IDE, or RAID) in BIOS matches the setting used during OS installation to avoid boot conflicts; 6. Reset BIOS to default settings to eliminate configuration issues, then save and exit; if all steps fail, the drive may be dead or the OS irreparably corrupted, requiring replacement and reinstallation after data backup if possible.

How to fix \

When your computer shows the error "No bootable device found", it means the system can't detect a drive with a valid operating system to start from. This can happen on laptops, desktops, or even after installing new hardware. Here’s how to diagnose and fix it step by step.

How to fix

1. Check Boot Order in BIOS/UEFI

The most common cause is an incorrect boot order.

Steps:

How to fix
  • Restart your computer.
  • Press the BIOS/UEFI key (usually F2, F10, Delete, or Esc — depends on your brand).
  • Go to the Boot tab.
  • Make sure your primary drive (SSD/HDD) is set as the first boot device.
  • If your drive isn’t listed, it may not be detected — proceed to hardware checks.

? On some systems (especially Dell or HP), you might see “PXE-E61: No bootable device” — same issue, same fix.


2. Verify the Drive Is Detected

Even if the boot order is correct, the system must detect the drive.

How to fix

In BIOS:

  • Look under Storage, Drives, or Main tab.
  • Check if your hard drive or SSD appears.
  • If it doesn’t show up, the issue could be:
    • Loose cable (for desktops)
    • Failed drive
    • Disabled SATA port
    • Incorrect SATA mode (IDE vs AHCI)

Fixes:

  • Shut down and unplug the PC.
  • Open the case (desktop) and reseat SATA and power cables.
  • Try a different SATA port or cable.
  • For laptops: the drive may be dead or disconnected — consider professional help or reseating if accessible.

3. Repair Bootloader (Windows)

If the drive is detected but still won’t boot, the bootloader may be corrupted.

You’ll need:

  • A Windows installation USB/DVD
  • Access to another working PC

Steps:

  1. Boot from the Windows installer.
  2. Choose Repair your computer > Troubleshoot > Advanced Options.
  3. Use one of these tools:
    • Startup Repair – automatically fixes common boot issues.
    • Command Prompt (for manual repair):
      bootrec /fixmbr
      bootrec /fixboot
      bootrec /scanos
      bootrec /rebuildbcd
    • If the C: drive isn’t recognized, assign a drive letter using diskpart.

?? This often fixes issues after disk cloning, accidental deletion, or failed updates.


4. Check for Drive Failure

If the drive isn’t detected anywhere, it might be dead.

Signs of failure:

  • Unusual clicking sounds
  • BIOS doesn’t detect it
  • Previously working drive suddenly gone

What to do:

  • Test the drive on another computer.
  • Use a USB-to-SATA adapter to check if it appears as external storage.
  • If drive is dead, you’ll need to replace it and reinstall Windows.

5. SATA Mode Mismatch (AHCI vs IDE vs RAID)

Sometimes, changing SATA mode in BIOS (e.g., after a reinstall) causes this error.

Fix:

  • Enter BIOS and check SATA Operation or Storage Mode.
  • If you recently reinstalled Windows, ensure the mode matches what was used during install:
    • Most modern systems use AHCI
    • Older systems may use IDE/Legacy
    • Dual-boot or RAID setups may use RAID

?? Changing this after OS install can cause boot failure. Use registry tweaks or safe mode if switching is necessary.


6. Reset BIOS to Defaults

A misconfigured BIOS setting can cause boot issues.

Try:

  • In BIOS, select Load Setup Defaults or Reset to Default.
  • Save and exit.
  • Check if the drive appears and boots.

Summary: Quick Checklist

  • ? Restart and enter BIOS (F2/Del etc.)
  • ? Is the drive listed under storage?
  • ? Is it set as first boot device?
  • ? Try reseating cables (desktop)
  • ? Boot from Windows USB and run Startup Repair
  • ? Test drive on another machine
  • ? Check SATA mode (AHCI/IDE/RAID)

If none of these work, the drive may be dead or the OS corrupted beyond repair. In that case, back up data (if possible) and replace the drive.

Basically, start simple — check BIOS and connections — before jumping to reinstallation. Most times, it’s just a setting or loose cable.

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