Microsoft Windows HRESULT Error Code 0x80070079: How to Fix It

Easy 15-30 minutes Medium Severity Verified June 2026
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Error Code
0x80070079
Brand
Microsoft Windows
Product Type
hresult
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Error 0x80070079 occurs when Windows encounters a semaphore timeout, meaning a device or service is not responding within the expected time. This often happens with external drives, USB devices, or network transfers. The fix typically involves updating drivers, checking connections, or adjusting power settings.
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How to Fix Error Code 0x80070079

  1. Restart Your Computer

  2. Reconnect External Devices

  3. Update Device Drivers

  4. Run the Hardware and Devices Troubleshooter

  5. Check for Windows Updates

    Back up your data before major updates.

  6. Disable USB Selective Suspend

  7. Use Command Prompt to Repair System Files

    Run Command Prompt with admin rights to avoid 'access denied' errors.
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When to Call a Professional

If the error persists after all steps, it may indicate failing hardware (like a damaged USB controller or external drive). Contact a computer technician to diagnose hardware issues.

Frequently Asked Questions

What does error 0x80070079 mean?
It means a semaphore timeout occurred, usually when Windows tries to communicate with a device that isn't responding fast enough. It's common with USB drives, external hard drives, or network file transfers.
How do I fix error 0x80070079 when copying files?
Try updating USB drivers, disabling USB selective suspend in power settings, and running the CHKDSK command to check the disk. If using a network, verify your connection and access permissions.
Can error 0x80070079 damage my files?
The error itself doesn't damage files, but if it occurs during file transfer, the transfer may fail or corrupt the file. Always back up important data before attempting fixes.
Does error 0x80070079 affect Windows 10 or Windows 11?
Yes, this error can occur on both Windows 10 and Windows 11. The fixes are the same for both versions.
What if error 0x80070079 appears during Windows Update?
Run the Windows Update troubleshooter, clear the SoftwareDistribution folder, or perform a system file check (SFC scan). If that fails, use the Windows Update Assistant to manually update.

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