I found this article and had to chuckle a bit. Here's the introduction to the "Fix":
One of the components of the Internet connection on your computer is a built-in set of instructions called TCP/IP. TCP/IP can sometimes become damaged or corrupted. If you cannot connect to the Internet and you have tried all other methods to resolve the problem, TCP/IP might be causing it.
If you don't have an Internet connection, you'll never find the article. Just thought that was funny.
Here is the manual Fix:
The reset command is available in the IP context of the NetShell utility. Follow these steps to use the reset command to reset TCP/IP manually:
To open a command prompt, click Start and then click Run. Copy and paste (or type) the following command in the Open box and then press ENTER:
At the command prompt, copy and paste (or type) the following command and then press ENTER:
netsh int ip reset c:\resetlog.txt
Note If you do not want to specify a directory path for the log file, use the following command:
netsh int ip reset resetlog.txt
Reboot the computer.
The full article uses a FIX THIS PROBLEM link, but I still don't see how that helps if you don't have an Internet connection. (I clicked on the FIX THIS PROBLEM link and snagged the .msi file) Read on...