I have bought a Dell Inspiron N5520 laptop. But after installing 12.04 or any other versions (e.g. 10.04, 11.04, 11.10), I cannot find any wireless network. Even the wireless network settings are not available.
I think this is due to some driver problems. I connected my PC to Ethernet LAN and tried to download the drivers through Addition Driver Installation software, but it shows only the Display and Graphics Drivers.
What to do now? Please help. I am a college guy and need Ubuntu for programming. I am going to connect it again to LAN.