Tuesday, August 5, 2025

💻 How to Fix “No Bootable Device Found” on Startup








 

🔍 Step 1: Check Boot Order in BIOS

  • Restart your PC and press the BIOS key (F2, Del, Esc, or F10) during startup
  • Navigate to the Boot tab
  • Ensure your main drive (usually labeled as HDD or SSD) is set as the first boot device
  • Save changes and exit

🧭 Incorrect boot priority is the most common cause of this error

🔌 Step 2: Inspect Physical Connections

  • Power off your PC and unplug it
  • Open the case and check SATA or NVMe connections to the boot drive
  • Reseat cables and ensure the drive is properly mounted

🧰 Loose or damaged cables can prevent drive detection

🧪 Step 3: Run Startup Repair

  • Insert a Windows installation USB and boot from it
  • Select Repair your computer → Troubleshoot → Startup Repair
  • Let Windows scan and fix boot-related issues

🛠️ Startup Repair can fix missing or corrupt boot files

🧬 Step 4: Rebuild Master Boot Record (MBR)

  • Boot from Windows USB → Open Command Prompt
  • Run these commands:

    • bootrec /fixmbr 

    bootrec /fixboot 

    bootrec /scanos 

    bootrec /rebuildbcd

  • Restart and check if the error is resolved

🧠 MBR corruption can prevent Windows from loading

🧯 Step 5: Activate Disk Partition

  • In Command Prompt, run:

    • diskpart

     list disk 

    select disk 0 

    list partition 

    select partition 1 

    active 

    exit

  • This marks the system partition as active

📌 Inactive partitions won’t boot even if they contain Windows

🔄 Step 6: Replace or Reinstall Drive

  • If the drive isn’t detected in BIOS or diagnostics fail, consider replacing it
  • Reinstall Windows on a new drive if needed

⚠️ Dead drives can’t boot—backup data if possible before replacing