after how many years of having wireless connectivity to our router from my laptop - my step father has suddenly decided to disable
I think you misunderstood something… if the WLan is disabled in router settings, then you will not be able to receive the WLan signals using the notebook.
You have to enable the WLan in router settings (should read the router user manual).
After the WLan has been enabled and configured in router settings, you can enable the Wlan functionality on notebook and can configure the Wlan card settings to establish the connection.