I have an Asus K53S Series with Intel Wireless Centrino N 100. When I instalated Windows 7 Ultimate 64 bits without updates were not problems, but when I started to install updates & SP1, My WiFi tell me "Adapter not found"
Curent version of Intel PRoSet/Wireles is 14.2.0000. I uninstaled it and installed the latest version (15.0) and this latest version dont even appear on sistem tray.
I tried to found some answers in older threads but none was helpful.
Sorry for my bad english.
As you install Windows 7 Ultimate 64 bits and it only presents problems when you update to SP1 what I would recommend is doing a system restore and then getting in contact with Microsoft* for further assistance due to the fact that you may have a problem with your Operating System instead of the actual wireless driver.