I have an Acer Extensa 5220 running an Atheros wireless connection. If I disable the connection through My Network Places then close the lid, when I reopen it, the connection no longer exists. Not only is the wireless connection not in My Network Places but if I go to Device Manager it has completely disappeared there too. In Device Manager there is nothing else showing with a cross or a question mark.
I can try reinstalling the driver but it says there's not Atheros card present.
If I go back to factury default through Recovery Management (and reinstall everything!!) the Atheros wireless connection reappears so it's nothing physically wrong.