Problem connecting to internet

Hi,
Just bought a macbook air and am having trouble connecting to wireless internet. It can detect and connect to the network, but when i try and use safari, it says "you are not connected to the internet". Have tried network diagnostics to no avail (it can't get past network settings), and now have an exclamation mark in front of the reception bars.
We also have a MacBook and a MacBook Pro, which have had no issues connecting to and using the internet.
Am not very mac-savvy, so have run out of ideas...
help!
Hannah

This seems to be a universal problem for the Macbook Air, that I have experienced myself. The Air will randomly be unable to connect to the internet, even on familiar AirPort networks, and will decide to drop internet connectivity for no apparent reason. This happens to me regularly still, even when my PS3 and other devices on the same network connect to the Internet just fine.
After much frustration and troubleshooting, here is the solution to this problem:
1. Turn off your AirPort. Go to the Status Bar or System Preferences>Network and turn off the computer's AirPort.
2. Restart the computer.
3. Turn the AirPort back on. Immediately you will be prompted with two "Allow" or "Cancel" operations. The computer is asking you if you will allow two applications to perform network related tasks. Obviously, "Allow" both of them. Connect to your regular AirPort if your Air does not do it automatically.
4. Launch your Internet browser and you should be good to go.
I love Apple products and have rarely encountered asinine problems like this, but the Macbook Air seems to be a truly finicky and unreliable product. Shame on you, Apple.

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To Apple Discussions!
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===============
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Message was edited by:
kstuart101

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