⚠️ 1 verified solutions available for Error 13005 — Last updated 2026-03-13
Error 13005 📋

Fix ERROR_IPSEC_MM_POLICY_IN_USE — Windows Error Code 13005

Error 13005 (ERROR_IPSEC_MM_POLICY_IN_USE) is a Windows Internet & WinHTTP error that occurs when the specified main mode policy is being used.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 13005 📛 ERROR_IPSEC_MM_POLICY_IN_USE 📅 Updated: 2026-03-13 ⏱️ 1 Solutions

🎮 Common Scenario: Are you experiencing Error 13005 while launching or installing Elden Ring? The solutions below directly address the system interactions specific to this application.

⚡ Quick Fix

Reset Internet Settings: Open Command Prompt as Administrator

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📑 Table of Contents
What is Error 13005? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 13005?

Windows System Error Code 13005, known as ERROR_IPSEC_MM_POLICY_IN_USE, is a Internet & WinHTTP error that occurs during WinHTTP, WinInet, and internet protocols. The error indicates that: The specified main mode policy is being used. When this error is encountered, the Windows operating system was unable to complete the requested operation within the internet services subsystem. The error code 13005 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_IPSEC_MM_POLICY_IN_USE 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 WinHTTP, WinInet, and internet protocols is essential for effective troubleshooting.

⚠️ Common Causes

  • Proxy misconfigured
  • SSL/TLS handshake failure
  • Client certificate expired
  • WinHTTP response timeout
📚 Comprehensive Guide

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An in-depth encyclopedia on successfully repairing corrupted Windows image files and system components using SFC and DISM command line tools.

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✅ Step-by-Step Solutions

1 Reset Internet Settings
  1. Open Command Prompt as Administrator
  2. Run: netsh winhttp reset proxy
  3. Open Internet Options → Advanced → Reset
  4. Restart your browser and applications

🎬 Video Tutorials

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How To Fix Internet Connection Error Windows
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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 "*13005*" -or $_.Message -like "*ERROR_IPSEC_MM_POLICY_IN_USE*"} | Format-List

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

🛡️ Prevention Tips

  • Use centralized proxy management
  • Keep root certificates updated
  • Disable legacy SSL 3.0 protocol
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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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