I'm having trouble getting the FTDI drivers for one of my Nano's to work properly. I have a Gravitech nano 3.1 that works perfectly, but the driver doesn't seem to recognize my other. This one, I suspect is a Chinese knockoff, however I have been able to program on it in the past. Btw, I am running windows 8.1 x64. Any help would be greatly appreciated.
See if your symptoms match what's described in this thread: http://forum.arduino.cc/index.php?topic=270175.msg1909867#msg1909867
If so, there is a fix recommended in there. If the video is hard to see, I have made another one of the same process: https://hackscribble.tinytake.com/sf/MTkyXzI1ODQ
The video fix works perfectly! Thank you so much!