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0x000000C9BSODCritical

0x000000C9 — Driver Verifier Iomanager Violation | Blue Screen Fix Guide

DRIVER_VERIFIER_IOMANAGER_VIOLATION

Windows 10Windows 11

What Does 0x000000C9 Mean?

Driver Verifier detected that a driver violated an I/O Manager rule.

Real-World Causes

  1. 1Driver violating I/O Manager API rules
  2. 2Improper IRP handling detected by verifier
  3. 3Driver I/O completion errors

Symptoms

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

DIY Fix

Beginner-friendly steps you can try at home

  1. 1Restart your computer
  2. 2Update or roll back recently installed drivers
  3. 3Run System File Checker (sfc /scannow)
  4. 4Check Windows Update for driver updates

Advanced Fix

For experienced users and IT professionals

  1. 1Analyze crash dump with WinDbg
  2. 2Run Driver Verifier to isolate faulty driver
  3. 3Use Safe Mode to uninstall problematic drivers
  4. 4Check Event Viewer for related errors

Frequently Asked Questions

What causes DRIVER_VERIFIER_IOMANAGER_VIOLATION?
Driver Verifier detected that a driver violated an I/O Manager rule.
Can I fix Driver Verifier Iomanager Violation 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

0x000000C4Driver Verifier Detected Violation0x000000E6Driver Verifier DMA Violation

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.