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0x00000055BSODCritical

0x00000055 — Data Coherency Exception | Blue Screen Fix Guide

DATA_COHERENCY_EXCEPTION

Windows XPWindows VistaWindows 7Windows 8Windows 10Windows 11

What Does 0x00000055 Mean?

A data coherency exception was detected by the processor, indicating data cache corruption.

Real-World Causes

  1. 1CPU cache failure
  2. 2Overheating processor
  3. 3Hardware defect
  4. 4Overclocking instability

Symptoms

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

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Restart your computer
  2. 2Check all hardware connections
  3. 3Run Windows Memory Diagnostic
  4. 4Check for overheating

Advanced Fix

For experienced users and IT professionals

  1. 1Run comprehensive hardware diagnostics
  2. 2Test components individually (CPU, RAM, GPU)
  3. 3Check for firmware/BIOS updates
  4. 4Inspect motherboard for physical damage

Frequently Asked Questions

What causes DATA_COHERENCY_EXCEPTION?
A data coherency exception was detected by the processor, indicating data cache corruption.
Can I fix Data Coherency Exception 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

0x00000056Instruction Coherency Exception0x0000009CMachine Check Exception

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.