Strangely I also have this problem right now. After I downloaded Metro LL last night, i slept my PC, and in the morning, no wifi. I did the Hkey local machine fix, also the IPv4 fix, and really everything. Also I tried the ip release/refresh from cmd, the problem was when I tried to release, I recieved the no operation can be peformed on "Wireless Network 3" , "2" and the "local area connection" while it has its media disconnected. I have a hunch that it was because I configured some utorrent settings and maybe that interfered with my connection. I am on my laptop, my problem is on my desktop.
EDiIT: Well Im not sure if fully turning off my desktop worked, or turning off the surge protector for the router for about 30 seconds worked. But I got everything back to normal..Try that?