That would be at Sony on the web page of drivers for your model.
https://www.sony.com/electronics/support/personal-computers-laptop-pc does not list a 7192 but some 719e and 719c so I can't help you if there is a typo there.
It can be the router. I just fixed one where the owner had turned on MAC address filtering but forgot that.
This 100 buck laptop if it's the model I think it is, is also old and the WiFi card could be dead. I do not repair that but try some USB WiFi stick or dongle because repair on such old gear is too dangerous.
Sony Vaio PCG-7192L: Getting unidentified network, no connection to internet, yellow triangle and exclamation mark. My other Sony desktop and Toshiba tablet are able to get internet, so it is not the router or modem. I was advised that it could be the driver. I don't know what to do. Could someone guide me on how to get to the internet? Thanks

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