Keith Thanks for the info etcI downloaded and installed the ESU 2.7.9 and 4.4.15 software today. I decided to try connecting the Lokprogrammer with it's new FTDI USB 2 cable, before searching for drivers, and BINGO it all works fine, using Win 8.1 - 64bit - with an added "start menu"icon_wink.gifPresumably Win must have searched/found/ and installed the necessary drivers "silently" with no notifications etcA result - very pleased !b2zero