I have an U100 and installed a 407159-001 and no .

Following the posts @ Mac Rumors I removed each service one by one, added Airport, restarted, and it works!

Remember to hit apply after removing the services. Then add Airport. Hit apply again. Restart the computer. And it should work.

I noticed that I have to have the hard wifi switch set to on when the computer is starting. Not sure if this maters, but just a note.

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