New Internet provider

I have just changed my Internet provider to Foxtel. Avast doesn’t recognise it and continues to look for my old Netgear router, then tells me it is unsafe! I no longer have the routher as Foxtel Hub is Wifi. Can you help please It’s aMCCtnnoying! :-\

Perform a repair of avast and see if it solves the problem.
If not, perform a clean installation of avast.

What OS ??? What version of Avast ??? Is wifi turned on on your computer ???