Microsoft Windows Error Code 0xC0000056: How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
0xC0000056
Brand
Microsoft Windows
Product Type
operating_system
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Windows error code 0xC0000056, known as STATUS_DEVICE_POWER_FAILURE, indicates that a device connected to your computer lost power during an operation. This can happen with external drives, USB devices, or internal components. The error may cause crashes, freezes, or blue screens. This guide provides easy-to-follow steps to diagnose and resolve the issue.
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Tools You'll Need

How to Fix Error Code 0xC0000056

  1. Restart your computer

  2. Check power connections

    Shut down your computer before touching internal cables.

  3. Update drivers

  4. Run Windows Memory Diagnostic

    Your computer will restart immediately.

  5. Check for overheating

    Unplug the computer before cleaning internal components.

  6. Run System File Checker (SFC)

  7. Check power supply unit (PSU)

    Opening a PSU is dangerous; seek professional help.

Parts You May Need

Power supply unit (PSU)
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Power supply unit (PSU)
Check Price on Amazon
Power supply unit (PSU)
Check Price on Amazon
Power supply unit (PSU)
Check Price on Amazon
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When to Call a Professional

If none of the above steps resolve the error, the issue may be a failing power supply unit or motherboard. A technician can test components with specialized tools and safely replace them. Also, if you encounter burning smells or constant blue screens, seek professional help.

Frequently Asked Questions

What does Windows error 0xC0000056 mean?
Error 0xC0000056 indicates a device connected to your computer lost power during an operation. This can be due to loose cables, faulty drivers, overheating, or a failing power supply.
Can I fix error 0xC0000056 by restarting?
Sometimes a simple restart resolves temporary glitches. If the error persists after restarting, try the other steps like updating drivers or checking hardware connections.
Is error 0xC0000056 caused by a virus?
Unlikely. This error is hardware-related, not typically caused by malware. However, running a virus scan is always a good practice if you suspect infection.
How do I prevent error 0xC0000056 in the future?
Ensure all device cables are secure, keep your system and drivers updated, clean dust from vents regularly, and consider a surge protector. If using external drives, safely eject them before unplugging.
Should I reinstall Windows to fix error 0xC0000056?
Reinstalling Windows is a last resort. It may fix software issues but will not resolve hardware problems like a failing power supply. Try all other steps first.

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