So when you try to connect, does your wifi network show up in the list?
Has your computer been assigned an IP address? What are the first 3 numbers?
if it is 169 then you are connected to the router but not the internet so this could be useful information.
Have you tried uninstalling any old network drivers? Sometimes leaving them installed can interfer with the new drivers.
It looks like you are having an uncommon issue and im sure it’s frustrating but let’s try to get as much info as possible.