I'm still having the no wifi problem in Bootcamp/Win 8.
I've re-installed Bootcamp, and replaced the Broadcomm BCM4360 driver (to the best of my ability - it only took the Download 1 from the link above)) and at least my Win8 seems to be looking for a wifi network now, but can't find anything.
The rebooting and shutting down hasn't worked, and I've never turned off the Bluetooth in OS Mavericks.
When I option-key boot up, I get a network pulldown menu that shows my wifi, but if I sign in, then boot up Win8, it gives me a Win8 error message and shuts itself down again, rebooting in OS X (the "preferred" OS option).
If I option-key boot up for Win8, but don't select any network (my usual means), I can get to Win8 fine, but I've never had a wifi connection.
Click on the link and it will explain it. Please give thumps up if this helps. i had the same problem and this blog helped me
This is exactly the problem i have too, except i installed the ASUS drivers from the link posted earlier.
Have someone been able to fix this? I'm running 13-inch Air Mid 2013 with Windows 8.1
I'll try adding my network manually, but that won't work at my school etc. because i can't get the needed information, so i really need a fix for this.
I searched also the whole day to find a solution.
Here is what fixed the problem for me:
Try the WWM workaround by just going to device manager and in the properties of the "Broadcom 802.11ac Network Adapter" and select the advanced tab, then scroll down till you see WWM and make sure the value is set to Disabled.
Hope this will fix your problem too.