Microsoft Windows Error Code 0x80070040: How to Fix It

Easy 15-30 minutes Medium Severity Verified June 2026
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Error Code
0x80070040
Brand
Microsoft Windows
Product Type
hresult
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Error 0x80070040 in Windows indicates that the network name was deleted (ERROR_NETNAME_DELETED). This typically happens when a mapped network drive or network path becomes unavailable due to a disconnected device, network interruption, or incorrect credentials. The error prevents you from accessing shared files or drives. This guide walks you through simple fixes to restore network connectivity.
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How to Fix Error Code 0x80070040

  1. Restart Your Computer and Network Devices

  2. Disconnect and Reconnect the Mapped Network Drive

    Ensure you have the correct network path and permissions before reconnecting.

  3. Run the Network Troubleshooter

  4. Check Network Credentials

  5. Use Command Prompt to Clear Persistent Mappings

    This will delete all currently mapped drives. Make sure you know the paths to reconnect them.

  6. Disable IPv6 if Unnecessary

    Only disable IPv6 if your network doesn't require it. Most home networks work fine with IPv4 only.
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When to Call a Professional

If you've tried all steps and still see error 0x80070040, the issue may be with the shared device or server itself. Contact your network administrator or IT support if you're in a corporate environment.

Frequently Asked Questions

What does error 0x80070040 mean?
It means 'ERROR_NETNAME_DELETED' — the network connection was lost because the shared folder or drive was disconnected or unshared.
Can error 0x80070040 be caused by antivirus software?
Yes, occasionally antivirus can block network mappings. Temporarily disable your antivirus to test, but re-enable it afterwards.
Will I lose data by disconnecting a mapped drive?
No, disconnecting a mapped drive only removes the shortcut. Your data remains safe on the network share.
Why does error 0x80070040 appear randomly?
It usually appears when network services are interrupted, e.g., due to sleep mode, router reboot, or changes in network permissions.
How do I check if a network drive is still available?
Try accessing the network path directly via File Explorer (type \\server\share). If you can see files, the drive is available; the mapping just needs to be refreshed.

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