Step-by-Step Guide to Fix Error Code 0x000000D4

0x000000D4 Error:The Segment is Locked BSOD in Windows

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What is the 0x000000D4 Error?


The 0x000000D4 error occurs when a process or driver attempts to reallocate or modify a memory segment that is currently locked by the Windows kernel. Memory segments are locked to prevent simultaneous access or modification that could corrupt system data. When a driver, kernel-level service, or system process tries to change or free a locked memory segment, Windows detects the violation and immediately triggers a Blue Screen of Death to protect system integrity. This error is commonly linked to faulty drivers, kernel memory handling issues, system file corruption, or unstable hardware configurations.

Causes

  • Faulty or incompatible drivers attempting to modify locked memory segments.
  • Improper memory management by kernel-level drivers or services.
  • Corrupted system files affecting Windows memory allocation routines.
  • Conflicts with third-party kernel-level software such as antivirus, VPNs, virtualization tools, or system monitors.
  • Defective or unstable RAM modules.
  • Outdated BIOS or firmware causing memory handling conflicts.

Resolution Steps




1. Disable Driver Verifier (If Enabled)

  • Boot into Safe Mode.
  • Open Command Prompt (Admin).
  • Run: verifier /reset
  • Restart the system to disable Driver Verifier.

2. Update or Roll Back Drivers

  • Open Device Manager.
  • Update outdated drivers using official manufacturer sources only.
  • Roll back recently installed drivers if the BSOD started after a driver update.
  • Focus on graphics, storage, network, chipset, and system drivers.

3. Repair Corrupted System Files

  • Open Command Prompt (Admin).
  • Run: sfc /scannow
  • After completion, run:
  • DISM /Online /Cleanup-Image /RestoreHealth
  • Restart the system after both scans finish.

4. Test RAM for Memory Errors

  • Open the Run dialog.
  • Run: mdsched.exe
  • Restart and allow Windows Memory Diagnostic to complete.
  • Test RAM modules individually if errors are detected.
  • Replace faulty memory components if required.

5. Uninstall Conflicting Third-Party Software

  • Boot into Safe Mode.
  • Uninstall recently installed kernel-level software such as:
  • Antivirus or endpoint security tools
  • VPN clients
  • Virtualization platforms
  • Overclocking or hardware monitoring utilities
  • Restart the system normally and check for stability.

6. Check Disk and File System Integrity

  • Open Command Prompt (Admin).
  • Run: chkdsk C: /f /r /x
  • Restart and allow the disk scan to complete.

7. Reset BIOS/UEFI Settings

  • Enter BIOS or UEFI during system startup.
  • Select Load Optimized Defaults.
  • Disable all CPU, GPU, and RAM overclocking.
  • Save changes and exit.

8. Perform a Clean Boot

  • Press Windows + R.
  • Run: msconfig
  • Hide all Microsoft services and disable remaining services.
  • Open Task Manager and disable all startup applications.
  • Restart and monitor system behavior.

9. Install Latest Windows Updates and Firmware

  • Open Windows Update.
  • Install all available updates, including optional driver updates.
  • Update motherboard BIOS or UEFI firmware to the latest stable version.

10. Perform an In-Place Upgrade or Clean Install

  • Use the Windows Installation Media Tool.
  • Choose Upgrade this PC now to repair Windows without data loss.
  • If the BSOD persists, back up critical data and perform a clean installation.

The error is typically caused by drivers or kernel-level processes attempting to modify locked memory segments, unstable memory, or conflicts with low-level system software.

To resolve this error effectively:

  • Disable Driver Verifier if enabled.
  • Update or roll back problematic drivers.
  • Repair system files using SFC and DISM.
  • Test RAM and verify disk integrity.
  • Remove conflicting third-party utilities.
  • Reset BIOS or UEFI settings and keep Windows updated.

If the issue persists, performing an in-place repair or clean installation ensures a long-term fix. Maintaining stable drivers, healthy memory, and updated firmware helps prevent the 0x000000D4 BSOD and keeps Windows running reliably.

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