How to Reinstall Network Connectionsby Stephen Lilley
Repairing a network connection can be accomplished in the Windows operating system similarly to the way a program installation would be repaired. Windows will uninstall the network connection and then immediately reinstall it, replacing any files relating to the connection that were corrupt or generally causing problems. This can be accomplished natively in Windows using the Control Panel and the network connection management utility.
Click "Control Panel."
Click "Network Connections."
Right-click on the network connection you would like to reinstall. Click "Repair." The rest of the process is entirely automated. Windows will uninstall the network connection and immediately reinstall it, allowing it to operate completely fresh and free from any debilitating issues.