1)Click Start , point to Settings , and then click Control Panel .

2)Double-click Network .

3)On the Configuration tab, click your TCP/IP protocol, and then click Properties .

4)Write down the settings that are displayed on each tab in the TCP/IP Properties dialog box.

5)Click Cancel , and then click Remove .

6)Click OK . When prompted to restart the computer, click Yes .

7)Click Start , point to Settings , and then click Control Panel .

8)Double-click Network .

9)On the Configuration tab, click Add .

10)Click Protocol , and then click Add .

11)In the Manufacturers box, click Microsoft .

12)In the Network Protocols box, click TCP/IP , and then click OK .

13)On the Configuration tab, click your TCP/IP protocol, and then click Properties .

14)Restore all the settings on each tab in the TCP/IP Properties dialog box, and then click OK .

15)Click OK . When prompted to restart the computer, click Yes .

Hope this works!