Windows Update should have a driver for it. I'd plug the unit to the PC, and then I'd go to Windows Update, and let it scan for updates for your PC. See if it finds and suggests a driver to install.
Tried that, still not recognized. (2 computers using Win 7 Ultimate 64 bit)Found this: "Also, be aware that neither the Pharos iGPS 500 device nor the Navation GPS 168 device runs on Windows XP 64-bit editions because they are incompatible with those systems. Both devices are compatible with Windows Vista 64-bit systems" on KB 894511, but there should be a driver by now.
Tried all that, still not recognizing this receiver. I have the old receiver from 2008 which works with 2010, but feel I wasted money buying the new complete package.