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0x00000079BSODCritical

0x00000079 — Mismatched HAL | Blue Screen Fix Guide

MISMATCHED_HAL

Windows XPWindows VistaWindows 7Windows 8Windows 10Windows 11

What Does 0x00000079 Mean?

The HAL (Hardware Abstraction Layer) does not match the kernel or the machine type. HAL.dll and ntoskrnl.exe are incompatible.

Real-World Causes

  1. 1Mismatched HAL.dll and kernel after manual file replacement
  2. 2Corrupted system files
  3. 3Incorrect Windows installation

Symptoms

  • ⚠Blue screen with stop code MISMATCHED_HAL
  • ⚠System reboots unexpectedly
  • ⚠Possible data loss from unsaved work

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Restart your computer
  2. 2Use Windows Recovery Environment
  3. 3Run Startup Repair
  4. 4Rebuild BCD with bootrec commands

Advanced Fix

For experienced users and IT professionals

  1. 1Rebuild BCD store manually
  2. 2Use bcdedit to verify boot configuration
  3. 3Repair Master Boot Record with bootrec /fixmbr
  4. 4Reinstall Windows if boot files are corrupted

Frequently Asked Questions

What causes MISMATCHED_HAL?
The HAL (Hardware Abstraction Layer) does not match the kernel or the machine type. HAL.dll and ntoskrnl.exe are incompatible.
Can I fix Mismatched HAL myself?
In many cases yes. Start with basic troubleshooting like restarting, updating drivers, and running System File Checker. If the issue persists, advanced analysis of crash dumps may be needed.

Related Error Codes

0x0000005CHAL Initialization Failed0x00000061Hal1 Initialization Failed

About the Author

Windows Troubleshooting Team

Verified against official Microsoft documentation and real-world diagnostic data. Error behavior confirmed across Windows 10, Windows 11, and Windows Server.