What to do if my WiFi isn't appearing?

[Ivan Capa]

Few days ago, my laptop's WiFi has been disconnecting then it disappears suddenly then appears. It continues to do so. But just now, I updated my laptop according to the Windows' update, (I'm a student so I don't really know any of these). Then, I can't connect to my WiFi and Bluetooth, (The Airplane mode isn't working also). I searched for any solution I find and ends up deleting the driver for my WiFi. Is there any way to get it back? Also, how can I fix this problem? Please, help me. I need my laptop to be fixed.

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