Hi,

I am not sure if this relates to your problem or not.

I connected my Impulse to a 64 bit Windows 7 system and there was no Impulse MIDI input/output visible in MIDI-OX or Kontakt.

I installed lots of different USB drivers that did not work. The problem system uses an Asus Z97-K motherboard with an Intel processor. I have a comparable 64 bit Windows 7 system with an AMD processor that sees the Impulse. So I know the Impulse works and the cable is good.

To cut a long story short I set xHCI to Disable in the USB option page on the UEFI/BIOS of the problem system. I rebooted and the MIDI devices connected via USB are visible and usable.