If you are experiencing problems with connecting to a wired or wireless connection, you can fix this problem by simply resetting the TCP/IP stack. Unfortunately, there’s no GUI way to do this, it has to be done in the command line.
First, I’ll assume you’ve verified that
1. For a wired connection, the LAN port indicator is blinking normally (usually blinks yellow)
2. For a wireless connection, other users can connect to the internet and your configurations are similar to theirs
Before you do this however, to save yourself trouble, please ensure you’ve tried the “Troubleshoot Network Problems” first. This can be done by simply right-clicking (or alternate-clicking) the wireless/wired icon on your task-bar to the right, and selecting “Troubleshoot Problems”. Allow the process to run automatically and you should be up and running.
If however this doesn’t work, then I believe that’s why you’re here
One click fix for network connectivity problems – Reset TCP/IP stack.
- Open command prompt (for Windows Vista/7/8, right click and click “Run as Administrator”).
- At the command prompt, copy and paste (or type) the following command and then press ENTER:
netsh int ip reset
- Reboot the computer.
If you are still experiencing problems after this, please read these posts