One suggested solution is to set the channel width to Auto. Solution 3 – Set the channel width to Auto For more details on how to do that, we strongly suggest that you check your modem’s manual. To do that, you’ll have to connect your PC with your modem using Ethernet cable, access your modem and change wireless SSID and password. It was reported that you can fix Wi-Fi doesn’t have valid IP configuration error by accessing your modem and changing the wireless SSID and password. Solution 2 – Change wireless SSID and password If the previous commands didn’t work, you might want to try these commands as well: Users reported that this solution usually fixes issues with IP configuration problem, but bear in mind that if you use static IP address you’ll have to set it again.