I have a Windows 8 PC and my Nikon D3100 isn't showing up on it. It says USB device not recognized. I have updated the USB drivers, but no joy. Sadly, i don't have the disc that came with it.
I can transfer photos fine on my mac, but when I connect it on Windows 7 it appears as an unrecognized device under Windows' device manager (with the little exclamation mark). Googling didn't return ...