I have a ps/2 connected ergonomic keyboard (part number 59758 ) branded as Microsoft "Natural Keyboard." It connects and lights up, but the computer shows no response to the keyboard. (It works fine with my old 98SE computer.) Somewhere along the maze of trying to figure it out, there was a Vista message that there was a logitech ps/2 keyboard driver that may be missing or corrupted (39). I can find no help on the microsoft.com site. A friend's USB keyboard works fine, but I want my ergonomic keyboard back. A few other postings show vaguely similar problems with ps/2 keyboards. I tried unistalling keyboard drivers, but the only one showing with the device manager was the USB keyboard. It uninstalled. I rebooted with the USB unplugged and the PS/2 plugged in. The PS/2 keyboard was still inoperative. I plugged in the USB keyboard, and it loaded a driver for the USB. Is there a solution? I suspect MS did not regression test their software against their own older PS/2 keyboard. Good ideas?