Just changed my router to Airport. Mac  Lap top and IPad works OK except my VAIO desk computer. It says that airport does not support the setting of the computer. Check the security setting. Whar

Just changed my router to airport extreme
My MacBook pro and iPad work fine but my VAIO wireless  desk computer is not working.
It says
, the router does not support the network .check security setting.
Which of the security setting will I change?
Thanks for your help.

John, thanks for the email so quickly.
I too hope I haven't tried "everything" either but I am reasonably technical.  I had done what you suggested to do before but I did both again.
Ethernet is yellow in the left side bar.  In the right pane it's status says Connected but then below it says "Ethernet has a self-assigned IP address and will not be able to connect to the Internet."
I have tried the assist me menu and Network Status has Ethernet Green, Network settings Yellow, ISP Green, and Internet and Server Red and Failed for both.  I have turned things off and on, checked cables, deleted all locations and tried restting them up but to no avail.  I even disconnected everything and connected the mac directly into the cable modem itself and the thing still will not connect.
Thoughts???

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