Repairing network connections

- Click on Start button
- Go to Control panel
- Choose Nework and Internet Connections
- Click Network Connections
- Right click Local Area Connection
- Click on Repair
- At last click on Close
Or
Command

- Go to Start button
- Click on Run
- type cmd and press enter
- type ipconfig/all press enter
- type ipconfig/releasepress enter
- type ipconfig/renewpress enter

Remove TCP/IP

Remove TCP/IP for the local area connection. To do this, follow these steps.

Note Before you remove TCP/IP, make a note of the IP and the DNS settings.
1. Click Start, point to Settings, and then click Network and Dial-up Connections.
2. Right-click Local Area Connection, and then click Properties.
3. In the Components checked are used by this connection list, click Internet Protocol (TCP/IP).
4. Click Uninstall, and then in the Uninstall Internet Protocol (TCP/IP) dialog box, click Yes.
5. When you are prompted to restart your computer, click Yes.