Reset IP stack

If you are sure it's your laptop's problem, try reset IP stack as follow instruction:

1. Left click the Start button
2. Select run
3. In the open box type: int ip reset c:\resetlog.txt
c:\resetlog.txt will show what changes existed. You can change this to whatever path you wish.

This command rewrites the TCP/IP registry keys. Essentially, this causes the same result as the removal and the reinstallation of the protocol.