I have the same problem also with my mom's laptop, which is also using vista.
I went to "Windows Mobility Center" and I saw a box that said "Wireless Off" but the button of "Turn Wireless On" is not functioning. I couldnt press that button. That button turns grey in color, so I couldnt press anything.
I try the combination "Fn + F2" --> Nothing's happened
Please please somebody help me to turn on the wireless
thank you so much