FYI - Network warning: There is another computer with the same IP address.
Yep. That means there is more than one computer in the house trying to access the Modem/WiFi. Windose is not very good at keeping them all separate.
In our house, at any given moment, we have 5 or 6 computers using the 'network'. Oops, wait, I lied. A half dozen computers and two printers. Windose gets confused and tells us, "There is another computer with the same IP address."
Sometimes a hot boot (Restart) works. Sometimes a Power Reset (pull the plug and wait two minutes) of the WiFi Modem works.
No need to worry. But you can be annoyed to the full extent of your ability. :-D