You might realize your ASUS ZenBook UX32VD wi-fi is off in Windows 8 and cannot turn back On using Fn + F2. Do the 3 steps below.
1. Plug in your Network cable.
2. Remove the Intel Wi-Fi driver from Device Manager.
3. Reboot your ZenBook.
Your Wi-Fi driver should be detected and reinstalled automatically and the Wi-Fi (On).