This device cannot start. (Code 10) Arduino Leonardo

I Want to use a Leonardo board to emulate a keyboard. When connecting the USB cable to my Asus Windows 10 laptop the installation of the driver stops with error ' This device cannot start. (Code 10)'
I tried al suggestions I found in this forum but without success.

  • manual install driver,
  • uninstall and restart after turning off the driver signature enforcement feature
  • tried a second board, new cable
  • installed old driver
  • used USB2.0 port
  • tried to install the board on a Windows 7 machine, again without success.
  • etc.

As far as I can see, it is an original board. A Uno-R3 board is working fine.
What to do?
Is there another type of board which I can use to emulate a keyboard?