Take a look at this BC tutorialUsing LSP-Fix to remove Spyware & HijackersLSP-Fix
is a utility designed to remove and repair problems associated with a a type of software called a Layered Service Provider, or LSP. LSPs are designed to integrate directly into your TCP/IP layer, the protocol you use to communicate on the Internet, in order to manipulate data that is sent across it. The LSPs are installed in such a way that each LSP in the TCP/IP handler are chained together. If one of these LSPs is removed incorrectly, that chain could become broken, possibly removing your ability to connect to the Internet or a network.
If that fix did not work, then you can try this alternate fix . Download the following program:Winsock2FixWinsock2Fix
is used to repair the LSP Chain on Windows XP computers.
When you run it, click on ReG-Backup button first to backup the registry, and then click on the Fix button.