MacBook Unibody (Early Jan 2010) Unable to Connect to Airport Extreme

The situation is that one MacBook purchased in Jan 2010 constantly unable to connect to the Airport Extreme.
The other MacBook could connect successfully without must fuss. Even the Win7 laptops also has no issue to be connected.
Do you think the MacBook has a connectivity issue?
Thanks in advance.

Samuel Tan wrote:
The situation is that one MacBook purchased in Jan 2010 constantly unable to connect to the Airport Extreme.
You might try resetting your connection settings using the steps listed in this message:
http://discussions.apple.com/thread.jspa?messageID=10695921&start=1
They're not guaranteed to solve the problem, but they'll only take a minute or so to try.

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