ping return error 10091

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Cannot connect with ISP, ping returns error 10091

Symptom: You are able to connect to another local computer or another computer on the local network or on the Internet. When you attempt to verify your network configuration by using the TCP/IP Ping.exe command-line utility (Ping Localhost or Ping 127.0.0.1), you may receive the following command-line error message:

PING: transmit failed, error code 10091

Cause: This issue can occur if an incorrect Windows Sockets dynamic link library (DLL) file is in the current path or there is more than one simultaneous Windows Sockets implementation. If there is more than one Winsock.dll file on your computer, be sure the first one in the path is appropriate for the network subsystem currently loaded.

This issue can also occur if the Windows Sockets implementation is not currently installed or is configured incorrectly.

Resolution: 1. Recover winsock32. Check this page Troubleshooting Winsock2 Issue

2. Remove and then reinstall your networking components. To do this, follow these steps:

Step 1: Remove Networking Components and Dial-up Networking

Step 2: Remove Network Registry Keys

Step 3: Reinstall Networking Components and Dial-up Networking