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Originally Posted by Enterprize
Well, off the top of my head I can say that I would severly doubt a wireless network card would be in a laptop that you would not be able to see with a quick glance. Namely, the antenna will need to be visible to be at all practical and all laptops I've seen use an expansion slot (usually on the sides, about twice as tall as a floppy but half the width. It's a port you can pop things in and out for quick mobility) for wireless connection.
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Incorrect--my laptop has an internal card, with no antennas poking out anywhere. (Hence I can chill here outside Preston and still get my CD fix.) And I've seen USB wireless adapters that can be used sans antenna--just plug and go. My brother used one on his desktop that he didn't want to crack the case on with no problems, but YMMV.
In every laptop I've seen, pressing (Fn)+F2 will normally enable or disable the wireless if it's installed internally. If that doesn't do anything, then odds are you don't have wireless.