Hey there James,
I think, it's pretty normal to disconnect your laptop from the network once there's no wi-fi signal.
Please, explain with more details the problem that you have with the wi-fi connection. Also, please share some info regarding where is the access point for the network you plan to connect to and have you made any changes to your laptop recently.
If there's a need for driver update of the network card, please, do so. You can do that by connecting the laptop directly to the Internet via Ethernet cable to your router/modem or use the strongeсt wi-fi signal to do the job.
Let me know how it goes.