I am new to Ubuntu & just installed it on my DELL mini laptop, when I open the network tab, it does not show the wireless networks around me, neither does it show mine, I have enabled networking but it still does not pick up any wireless. I am pretty sure my wireless network is not hidden, since I can connect and see it on my other laptop, anyone have any idea on what it could be?
It worked once when I was running Ubuntu on my USB, but when I installed it to the hard drive as the main OS it did not list any wireless networks.

System -> Administration -> Hardware Driversand tell if it offers you some drivers to install? – qbi Dec 18 '12 at 7:12