Two weeks ago I bought two arduinos pro micro in amazon. This ones TECNOIOT 2pcs Pro Micro ATmega32U4 5V/16MHz Module with Pin Head : Amazon.es: Industrial & Scientific.
But when I downloaded the IDE it didn't let me to put the code in them. I searched a bit and I discovered that the problem was that mi PC don't reecognize them. I try lots of cables or changing the ports, but it didn't work. I searched a lot, and all the people download drivers, or at least their device manager warn them that was a strange hardware. Not in my case, it doesn't have COM's port actived and the recognize of board is imposible.