How do I reinstall the TCP/IP protocol driver on Windows 7?

Reinstall and reset TCP/IP (Internet protocol)

1. Click on the Start button.
2. Type Cmd in the Start Search text box.
3. Press Ctrl + Shift + Enter keyboard shortcut to run a command prompt as administrator. Allow elevation request.
4. Type netsh int ip reset in the command prompt shell, and then press the Enter key.
5. Restart the computer.

Note: if you're using manually assigned TCP/IP settings, take notes as this will reset to the default 'automatically obtained'.

Reinstall and reset TCP/IP (Internet Protocol) for Windows 7 (32 and 64):

1. Click on Start button.
2. Click on Accessories.
3. Right click on Command Prompt and select Run as Administrator.
4. Type netsh int IP reset C:\resetlog.txt in the Command Prompt shell, and then press the Enter key. Do not restart computer.
5. Type netsh winsock reset in the Command Prompt shell, and then press the Enter key.
6. Restart the computer.

You'll find a log with the changes in C:\resetlog.txt.