What is Windows Error 6006 (ERROR_NO_USER_KEYS)?

Error 6006 (ERROR_NO_USER_KEYS) is a Windows Networking error that occurs when there are no efs keys defined for the user.. This guide provides step-by-step solutions to resolve this issue.

What causes Error 6006?

Network driver outdated/incompatible. TCP/IP stack corruption. IP configuration incorrect. Remote resource unreachable

How do I fix Error 6006 (ERROR_NO_USER_KEYS)?

Complete Network Reset: Open Command Prompt as Administrator. Run: netsh winsock reset && netsh int ip reset. Run: ipconfig /release && ipconfig /renew. Restart your computer

Fix ERROR_NO_USER_KEYS — Windows Error Code 6006

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⚡ Quick Fix

Complete Network Reset: Open Command Prompt as Administrator

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📑 Table of Contents

What is Error 6006? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 6006?

Windows System Error Code 6006, known as ERROR_NO_USER_KEYS, is a Networking error that occurs during advanced networking, Winsock, and IPSec. The error indicates that: There are no EFS keys defined for the user. When this error is encountered, the Windows operating system was unable to complete the requested operation within the networking stack subsystem. The error code 6006 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name ERROR_NO_USER_KEYS maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within advanced networking, Winsock, and IPSec is essential for effective troubleshooting.

⚠️ Common Causes

Network driver outdated/incompatible
TCP/IP stack corruption
IP configuration incorrect
Remote resource unreachable

✅ Step-by-Step Solutions

1 Complete Network Reset

Open Command Prompt as Administrator
Run: netsh winsock reset && netsh int ip reset
Run: ipconfig /release && ipconfig /renew
Restart your computer

🎬 Video Tutorials

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How To Fix Network Error Windows 10 11

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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*6006*" -or $_.Message -like "*ERROR_NO_USER_KEYS*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

Update drivers from manufacturer site
Monitor network utilization
Document network configuration

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Last updated: 2026-03-13

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Based on Official Microsoft Documentation

Solutions Tested on Windows 10 & 11

Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-13.