How to fix Error 711 on Windows 11

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Troubleshooting Guide: Error 711 – {TDI Event Pending}

Why This Error Happens

This error occurs at the Transport Driver Interface (TDI) layer, which historically manages communication between upper-level network drivers (like NetBIOS or TCP/IP) and lower-level NIC drivers on Windows systems. The “pending” state indicates that a network status indication was queued because the receiving driver could not process it immediately, often due to outdated or corrupted network drivers, a stalled network stack, or third-party firewall/VPN software intercepting TDI calls. Since TDI is a legacy component largely superseded by the Windows Filtering Platform (WFP), this error is frequently triggered by legacy VPN clients, antivirus network filters, or incompatible NIC drivers still relying on old TDI hooks in Windows 11.

Step-by-Step Resolution Guide

  1. Update Network Adapter Drivers
  • Press Win + X → select Device Manager.
  • Expand Network Adapters, right-click your active adapter → Update driver → Search automatically for drivers.
  • If an update is found, install it and restart your PC.
  1. Reset the TCP/IP Stack and Winsock Catalog
  • Open Command Prompt as Administrator.
  • Run the following commands sequentially:

    netsh int ip reset
    netsh winsock reset
    ipconfig /flushdns
  • Restart the computer to apply changes.
  1. Check for Legacy VPN or Antivirus Network Filters
  • Go to Settings → Apps → Installed Apps.
  • Look for older VPN clients (Cisco AnyConnect, older Fortinet clients) or third-party antivirus/firewall software known to install legacy filter drivers.
  • Temporarily uninstall or disable these to see if the error persists. Update to the latest version compatible with Windows 11 if needed.
  1. Verify and Repair System Files
  • Open Command Prompt as Administrator.
  • Run:

    sfc /scannow
  • Follow with:

    DISM /Online /Cleanup-Image /RestoreHealth
  • Restart once both scans complete.
  1. Inspect Event Viewer for Correlated Driver Errors
  • Open Event Viewer (eventvwr.msc).
  • Navigate to Windows Logs → System.
  • Filter for Event ID 711 and check the “Source” driver name in the details pane to identify which NIC or filter driver is triggering the pending state, then update or roll back that specific driver.

Alternative or Verification Steps

  • Verify the Fix: After restarting, open Event Viewer again and confirm Error 711 no longer appears under recent System logs during normal network activity (browsing, VPN connection, etc.).
  • Alternative Fix: If the error persists, try rolling back the NIC driver to a previous version (via Device Manager → Driver tab → Roll Back Driver), as newer drivers sometimes reintroduce TDI compatibility issues on Windows 11.