After Flip installation completion :


- Execute :
  Start > Programs > Atmel > FLIP > Install USB Drivers


- Plug the USB device and use the usb_dfu.inf file 
  as your device hardware driver file when you are 
  prompted by Windows to do so.
  The usb_dfu.inf file is located in the Program Files\ATMEL\FLIP x.y.z\usb directory.
