Brian, It's readily available on the WIKI... It is quite visible in the Windows software section, as 'libusb0'. The link to the WIKI page is http://openhpsdr.org/wiki/index.php?title=Libusb0_Notes. You will find the link to the signed drivers (needed for 64 bit windows 7) on that page. Vy 73, George K9TRV 1290007168.0