Being an old-timer, I've been running Jag-Air's Nixie Clock on Windows machines. See: http://www.clockvault.com/clocks%5Cnixiehowto.htm I've also used GPSCon with an HP Z3801 receiver as a source for SNTP. The Jag-Air solution is much simpler. Of course, NTP is more challenging, if that's what you want. Bill Hawkins