Microsoft Windows Error Code 0x000000C7: How to Fix It

Medium 1-3 hours High Severity Verified June 2026
Error Code
0x000000C7
Brand
Microsoft Windows
Product Type
operating_system
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
Windows Error Code 0x000000C7 (TIMER_OR_DPC_INVALID) is a critical system error that causes a Blue Screen of Death (BSOD). This error occurs when the Windows kernel detects a timer or Deferred Procedure Call (DPC) at an invalid memory location, typically caused by faulty drivers, corrupted system files, or hardware issues.
Ad

Tools You'll Need

How to Fix Error Code 0x000000C7

  1. Restart Your Computer

    Always save any open work before forcing a shutdown as unsaved data will be lost.
  2. Boot into Safe Mode

  3. Update All Device Drivers

  4. Run System File Checker

  5. Run DISM Tool

  6. Check Windows Memory Diagnostic

    This test requires a computer restart and can take 20-30 minutes to complete.
  7. Disable Problematic Services

    Only disable non-Microsoft services as disabling system services can prevent Windows from starting properly.
  8. Perform System Restore

    System Restore will uninstall programs and updates installed after the chosen restore point.
  9. Check Hardware Connections

    Always unplug the power cord and touch a grounded metal surface before handling internal components to prevent static electricity damage.
  10. Test RAM Modules

    Ensure the computer is powered off and unplugged before removing or installing RAM modules.

Parts You May Need

DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
DDR4 or DDR5 RAM modules
Check Price on Amazon
SATA or NVMe SSD
Check Price on Amazon
Ad

When to Call a Professional

Contact a computer technician if the error persists after trying all software solutions, if you're uncomfortable opening your computer case, if hardware testing reveals faulty RAM or other components that need replacement, or if the error occurs immediately after hardware installation or system changes you're unsure how to reverse.

Frequently Asked Questions

What causes Windows Error Code 0x000000C7?
Error 0x000000C7 is typically caused by faulty device drivers, corrupted system files, defective RAM modules, or hardware compatibility issues. The error occurs when the Windows kernel detects invalid memory operations by timers or DPC routines.
Can I fix 0x000000C7 error without reinstalling Windows?
Yes, most 0x000000C7 errors can be fixed without reinstalling Windows. Try updating drivers, running system file repairs, checking memory, and disabling problematic services. Only consider reinstalling Windows as a last resort.
Is the TIMER_OR_DPC_INVALID error dangerous for my computer?
While the error itself protects your system by stopping operations when invalid memory access is detected, the underlying cause could potentially lead to data corruption if left unfixed. Address the error promptly to prevent further issues.
How do I know if my RAM is causing the 0x000000C7 error?
Run Windows Memory Diagnostic or remove/test RAM modules individually. If the error only occurs with specific RAM sticks or in certain slots, the memory or motherboard may be faulty. Consistent errors across all RAM configurations suggest a software issue.
Will updating drivers fix the 0x000000C7 error?
Driver updates can fix this error if outdated or corrupted drivers are the cause. Focus on updating network, graphics, and storage drivers first, as these are common sources of DPC-related errors. Always download drivers from official manufacturer websites.