Wifi gone after updating Dell Inspiron 15 3537 with Ubuntu 12.04 preloaded

Hello all, new Dell user here.

I just purchased a Dell Inspiron 15 3537 with Ubuntu 12.04 preloaded. I was initially very satisfied with the smoothness of this laptop, until I updated my system.

After updating with the suggested updates by the "Update Manager" and restarting my system, the wifi stopped working. The wired LAN connection, as well as bluetooth connections are fine. Just that wireless networking has disappeared.

I greatly depend on the Wifi, and I have no other internet connection except Hotspot via my phone.
So I factory-reset my machine, wiped everything off, and Wifi was back again.


But if I update again, it will go away. What should I do?