this does not work, read below!
Reset Winsock using netsh

If resetting TCP/IP does not work for you, try to reset the TCP/IP stack using the reset command. First open the command prompt by going to Start, Run and typing CMD.

Now type the following command below:

netsh winsock reset catalog

The Winsock catalog will be reset to it’s default configuration. If you have a LSP that is corrupted and causing network connectivity problems, this command should repair that. Note that if you run this command, you may have to re-install several programs that had LSPs installed previously, such as Google Desktop Search, etc.

You can also check out the Microsoft Knowledge Base article below that details more steps you can take to fix Winsock2 corruption in Windows XP and Windows Vista:

Recover from Winsock2 corruption in Windows

Hopefully, one of the methods above has solved your network problem! If not, then you may have to reinstall Windows as it could simple be too corrupted.