similar problem with me too
tried to install latest PROSET driver and software (13.4) and since then wifi is not working under win7 x64. Tried installing the previous software - 13.3.0 - not working again. Drivers install successfully but I don't get any wifi networks in range, but there are at least 10 here.
As if it is not switched on. But I can see the light for wifi is ON.
Tried also drivers version 11.something. - same thing.
I have also win xp x32 installed, with it wifi is working no problemo.
Can anyone help?
Laptop is Dell XPS M1530