Boot Device Not Found

What is Boot Device Not Found?

The Boot Device Not Found error is categorized as a critical-severity hardware BIOS/UEFI issue that can significantly impact your PC's stability. The BIOS/UEFI firmware cannot locate a bootable operating system partition or storage drive. When experiencing the Boot Device Not Found fault, users often report sudden system crashes, unresponsive behavior, or a blue screen of death (BSOD). In most diagnostic scenarios, this problem is directly triggered by underlying hardware or software complications such as disconnected storage drive SATA or NVMe cables, corrupted boot files (MBR or BCD) and failed hard drive or SSD. To permanently resolve the Boot Device Not Found issue and prevent further system degradation, it is highly recommended to follow our step-by-step troubleshooting guide below, ensuring your hardware BIOS/UEFI components are functioning correctly.

Common Causes

• Disconnected storage drive SATA or NVMe cables
• Corrupted boot files (MBR or BCD)
• Failed hard drive or SSD

Step-by-Step Fix Guide

• 1
  Check physical SATA/power/NVMe connection

  Applying the first fix (Check physical SATA/power/NVMe connection) addresses the most common root cause of Boot Device Not Found and restores baseline functionality.

• 2
  Repair MBR/BCD via Windows Installation USB

  If the problem persists, proceeding with the remaining steps ensures all edge cases related to bios instability are covered.

• 3
  Check drive health status in BIOS

Commands & Diagnostics