Microsoft Windows Error Code 0x000000CB: How to Fix It

Medium 1-3 hours High Severity Verified June 2026
Error Code
0x000000CB
Brand
Microsoft Windows
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
Windows error code 0x000000CB (DRIVER_LEFT_LOCKED_PAGES_IN_PROCESS) is a Blue Screen of Death error that occurs when a device driver fails to properly unlock memory pages after completing an input/output operation. This critical system error typically indicates faulty or incompatible drivers that can cause system instability and crashes.
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Tools You'll Need

How to Fix Error Code 0x000000CB

  1. Boot into Safe Mode

    Back up important files before proceeding with driver troubleshooting in case system restoration is needed.
  2. Check Windows Event Viewer

  3. Update Device Drivers

  4. Run Driver Verifier

    Driver Verifier can cause additional blue screens during testing. Disable it by running 'verifier /reset' if system becomes unstable.
  5. Rollback Recent Driver Updates

  6. Check for Windows Updates

  7. Run Memory Diagnostic

  8. Perform System File Check

  9. Check Hardware Connections

    Ensure the computer is completely powered off and unplugged before opening the case to avoid electrical shock.
  10. Restore System or Reset Windows

    System Reset will remove installed programs while preserving personal files. Ensure you have installation media for important software.

Parts You May Need

RAM memory modules
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SATA or power cables
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RAM memory modules
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SATA or power cables
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RAM memory modules
Check Price on Amazon
SATA or power cables
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or power cables
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or power cables
Check Price on Amazon
RAM memory modules
Check Price on Amazon
SATA or power cables
Check Price on Amazon
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When to Call a Professional

Contact a computer technician if the blue screen persists after trying all troubleshooting steps, if you're uncomfortable working with device drivers or system files, or if hardware diagnostics reveal failing components like RAM or storage drives. Professional diagnosis may be needed for complex driver conflicts or underlying hardware issues.

Frequently Asked Questions

What causes Windows error code 0x000000CB?
Error 0x000000CB is caused by device drivers that fail to properly release locked memory pages after completing I/O operations. Common causes include outdated graphics drivers, network adapter drivers, antivirus software drivers, or hardware drivers that are incompatible with your Windows version.
Can I fix error 0x000000CB without losing my files?
Yes, most fixes for error 0x000000CB can be performed without data loss. The troubleshooting steps focus on updating or rolling back drivers, checking system files, and adjusting system settings. Only as a last resort would you need to reset Windows, which preserves personal files while reinstalling the operating system.
Is error 0x000000CB related to hardware problems?
While error 0x000000CB is primarily a driver software issue, it can sometimes indicate underlying hardware problems. Faulty RAM, loose connections, or failing storage devices can cause driver communication errors. Running memory diagnostics and checking hardware connections are important troubleshooting steps.
How do I prevent error 0x000000CB from happening again?
Prevent future occurrences by keeping Windows and drivers updated, avoiding incompatible or unsigned drivers, using reputable antivirus software, and regularly checking for hardware issues. Enable automatic Windows updates and only download drivers from official manufacturer websites.