I googled/binged M-Audio Fast track ultra USB soundcard win 10 drivers and found at least two sites that had Win 10 drivers:

http://drivers.softpedia.com/get/SOUND-CARD/M-Audio/

http://www.driverscape.com/download/m-audio-fast-track-ultra


Life is short so make sure you spend as much time as possible on the Internet arguing with strangers.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware