"Wi-Fi" doesn't have a valid IP configuration

Left Click on the Window icon at the bottom and type CMD

In the window that comes up at the top Right Click on the Command Prompt and select Run as Administrator

NOTE: A window will come up and ask if you want to allow this app to make changes to your device.  Select YES to bring up the Command Prompt for the system32 commands

At the > prompt type in the following

            > netsh winsock reset            <hit Enter>

Then type in the following

> netsh int ip reset                 <hit Enter>

Restart the Computer

This should do it, but you can check by going back in to the shell and typing in the following to see if you are getting assigned an address again

> ipconfig                                <hit Enter>