wifi name and password

1) Log into your router's admin page via 192.168.1.1  you may have to google how to do that part if those numbers don't work.

2) Go to the wireless settings portion and change your SSID(s) and passwords.

The best I can do for you is tell you to go to Microsoft Support and follow all Wi Fi leads. I have seen several time and time again over the last week or so. You will probably have to write down the instructions, unless you have a far superior memory than I do.