If people are still having the "'WiFi' doesn't have a valid IP configuration", and going into cmd is too daunting, or it didn't work, resetting the IP configuration I've given to the computer in question
via the router solved all my problems.
I'm not very good with computers but fiddling around without needing to change any major settings on my laptop really help to solve this problem. So I apologize in advance if you find it patronising (this is more for the non-computer experts at home)!
If you remember assigning a specific IP address for your laptop to your router, read on or at least give this one a shot:
- Log in to your modem's router configuration. Directions to get there may be on the manual for the modem.
- Navigate to your router's DHCP client list, or similar.
What is it?
It is a list that shows you the computers currently connected to your modem.
- Delete the computer in question from the client list. If you don't know the computer's name:
Right-click My Computer > Choose PropertiesThe name should be located at the lower half of the window.
- Check your troubled computer's network connection now. If there are no changes to the status and it's still showing a yellow exclamation mark, refresh by disconnecting and reconnecting or going to a fresh webpage.
If you check the list in your router's client list again, you should be able to see your computer's name reappear on the list as it's reconnected to your modem once more.
If the above didn't work, then I'm sorry your problem might be more serious for this troubleshooter.