How to reinstall TCP / IP on Windows 7

Reinstall and Reset TCP/IP (Internet Protocol)

1. Click on Start button.
2. Type Cmd in the Start Search text box.
3. Press Ctrl-Shift-Enter keyboard shortcut to run 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’