How to Reset TCP/IPby Harjinder Singh
Transmission control protocol/Internet protocol, more commonly referred to as TCP/IP, refers to a component of the Windows operating system that provides instructions to your system for the Internet connection. Problems in the TCP/IP can cause you to have trouble connecting to the Internet. You can often resolve Internet connection issues by resetting the TCP/IP. Because this is a core Windows component, you cannot remove it---the most you can do is reset it so that your Internet connection works properly. You can reset the TCP/IP in two ways: automatically or manually.
Automatic Fix for TCP/IP Settings
Download the Microsoft fix number "50199" to automatically reset the TCP/IP settings (see Resources). Choose "Run the file" when the download pop-up box appears.
Follow the on-screen prompts to complete the process once the file has been downloaded and the installer loads. The installer will automatically reset the TCP/IP settings.
Reboot your computer and verify that the Internet connection is working properly.
Manual Fix for TCP/IP
Run the Windows Command Processor (cmd.exe) by clicking the "Start" button and then "Run." Type in the name "cmd.exe" and hit the "Enter" key on the keyboard (in Windows XP or earlier). If you have Windows Vista or Windows 7, type the name in the box labeled "Search programs and files" and click on the "Command Processor" icon when it appears.
Type the following command line at the command prompt: "netsh int ip reset c:\resetlog.txt" (without the quotation marks). Then press the "Enter" key on your keyboard. This process rewrites two registry entries, which resets the TCP/IP, and the information is stored in the log file "resetlog.txt," which is located at the root of the C: drive.
Reboot your computer so that the changes can take effect.