Maybe you can help me too. I don't have the Windows N version as far as I can tell. I have 64 bit Windows 8.1 Pro with Media Center. My Lumia 1020 is running the Developers Preview. Since that was installed, my connection has become unreliable. For example, right now, I can here the connect tone over and over again but it never connects to my PC. When it does, it repeatedly installs the drivers, sometimes successfully and sometimes not. I thought it might be the jack itself since the cable does wiggle a bit when plugged in at the phone, but it seems to charge fine. Just doesn't get recognized as a device.