⚠️ 1 verified solutions available for Error 4391 — Last updated 2026-03-13
Error 4391 📋

Fix ERROR_REPARSE_ATTRIBUTE_CONFLICT — Windows Error Code 4391

Error 4391 (ERROR_REPARSE_ATTRIBUTE_CONFLICT) is a Windows DNS & WINS error that occurs when the reparse point attribute cannot be set because it conflicts with an existing attribute.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 4391 📛 ERROR_REPARSE_ATTRIBUTE_CONFLICT 📅 Updated: 2026-03-13 ⏱️ 1 Solutions

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⚡ Quick Fix

Flush DNS and Switch Servers: Open Command Prompt as Administrator

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📑 Table of Contents
What is Error 4391? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 4391?

Windows System Error Code 4391, known as ERROR_REPARSE_ATTRIBUTE_CONFLICT, is a DNS & WINS error that occurs during DNS resolution and WINS name resolution. The error indicates that: The reparse point attribute cannot be set because it conflicts with an existing attribute. When this error is encountered, the Windows operating system was unable to complete the requested operation within the DNS/WINS services subsystem. The error code 4391 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_REPARSE_ATTRIBUTE_CONFLICT 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 DNS resolution and WINS name resolution is essential for effective troubleshooting.

⚠️ Common Causes

  • DNS server misconfigured
  • Stale DNS cache entries
  • Hostname cannot be resolved
  • DNS server unreachable
📚 Comprehensive Guide

Troubleshooting COM and DCOM Architectural Failures (Event ID 10016)

A comprehensive guide on Component Object Model (COM), Distributed COM (DCOM), and how to safely interpret and resolve Event ID 10016 errors.

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✅ Step-by-Step Solutions

1 Flush DNS and Switch Servers
  1. Open Command Prompt as Administrator
  2. Run: ipconfig /flushdns
  3. Change DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1)
  4. Run: ipconfig /registerdns

🎬 Video Tutorials

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How To Fix Dns 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 "*4391*" -or $_.Message -like "*ERROR_REPARSE_ATTRIBUTE_CONFLICT*"} | Format-List

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

🛡️ Prevention Tips

  • Use reliable DNS (8.8.8.8 or 1.1.1.1)
  • Flush DNS cache periodically
  • Monitor DNS resolution performance
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Last updated: 2026-03-13
📖
Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-13.
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