⚠️ 2 verified solutions available for Error 6815 — Last updated 2026-03-19
Error 6815 📋

Fix ERROR_HANDLE_NO_LONGER_VALID — Windows Error Code 6815

Error 6815 (ERROR_HANDLE_NO_LONGER_VALID) is a Windows Networking error that occurs when the handle has been invalidated by a transaction. the most likely cause is the presence of memory mapping on a file or an open handle when the transaction ended or rolled back to savepoint.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 6815 📛 ERROR_HANDLE_NO_LONGER_VALID 📅 Updated: 2026-03-19 ⏱️ 2 Solutions
⚡ Quick Fix

Complete Network Reset: Open Command Prompt as Administrator

👇 See all 2 solutions below
🐞 Auto-Fix Script for Error 6815
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 6815? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 6815?

Windows System Error Code 6815, known as ERROR_HANDLE_NO_LONGER_VALID, is a Networking error that occurs during advanced networking, Winsock, and IPSec. The error indicates that: The handle has been invalidated by a transaction. The most likely cause is the presence of memory mapping on a file or an open handle when the transaction ended or rolled back to savepoint. When this error is encountered, the Windows operating system was unable to complete the requested operation within the networking stack subsystem. The error code 6815 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_HANDLE_NO_LONGER_VALID 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

  • System resource conflict: The handle has been invalidated by a transaction. The most likely cause is the presence of memory mapping on a file or an open handle when the transaction ended or rolled back to savepoint.
  • Network driver outdated/incompatible
  • TCP/IP stack corruption
  • IP configuration incorrect
📚 Comprehensive Guide

The Ultimate Guide to Understanding and Fixing the Blue Screen of Death (BSOD) in Windows 11 & 10

A comprehensive, expert-level encyclopedia on diagnosing, analyzing memory dumps, and permanently resolving Blue Screen of Death (BSOD) errors in Windows.

Read the full guide →

✅ Step-by-Step Solutions

1 Complete Network Reset
  1. Open Command Prompt as Administrator
  2. Run: netsh winsock reset && netsh int ip reset
  3. Run: ipconfig /release && ipconfig /renew
  4. Restart your computer
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Show Advanced Solutions (1 more)
2 Advanced Diagnostic for ERROR_HANDLE_NO_LONGER_VALID
  1. Open Windows Event Viewer (eventvwr.msc)
  2. Navigate to Windows Logs → System to find Event ID 6815
  3. Look for associated warnings that occurred immediately before the system crashed
  4. Right-click the entry and export the log file for further analysis

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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 "*6815*" -or $_.Message -like "*ERROR_HANDLE_NO_LONGER_VALID*"} | 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: 2026-03-19
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-19.
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