Why does my WiFi not connect

[Android Central Question]

I downloaded and installed the latest software update today, now wifi will not connect. Tried turning off and on the phone, also the wifi. Tried to connect entering the password, doesn't help. Wifi is working on my wife's phone and my laptop.

 

[B. Diddy]

Welcome to Android Central! Which phone? Try rebooting the router by unplugging its power for 10 seconds.