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Windows Error 720 — PPP Connection Failed

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Overview

Windows network error 720 means a connection to the remote computer could not be established because the PPP control protocol negotiation failed.

Key Details

  • Error 720 — PPP negotiation failure
  • Network protocols could not be negotiated
  • WAN miniport drivers may be corrupted
  • Common after Windows updates or driver changes

Common Causes

  • Corrupted WAN Miniport drivers
  • TCP/IP stack corruption
  • Incorrect network protocol configuration
  • Conflicting VPN or security software

Steps

  1. 1Reset TCP/IP: netsh int ip reset
  2. 2Uninstall and reinstall WAN Miniport adapters in Device Manager
  3. 3Reset Winsock: netsh winsock reset
  4. 4Reinstall network adapters from Device Manager

Tags

windowsnetworkppp connection failedwindows-errorfix

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Frequently Asked Questions

Point-to-Point Protocol — handles the connection and authentication layer for dial-up and VPN.