Some days ago I bought an Arduino Leonardo with Headers, I opened and connected in my computer for installing drivers, but when I connected the Arduino Leonardo with my computer it detects and a few seconds after is disconnected (it doesn't admit Arduino Leonardo), even Windows 7 generates the sound "hardware detected" and then the sound "hardware disconnected".
I tried to install the drivers, but still can not connect Arduino Leonardo with my computer, I have also tried with another miniUSB wire and nothing, it's same. The worst thing is that I have a project with it.
What happened, is my Arduino or my computer (port USB)?
Can you help me, please?
Thanks in advance.