I'm running Uiview and WinAPRS on my win 7 64bit desktop. And also on my win 7 32bit laptop. I added two after market serial ports on the same board on the new machine. i run UiView on one port and hamradio deluxe on the other no problems at all. Kevin Deckert,VE7WHK Amateur Radio Emergency Coordinator Wells Gray Country 250.678.5305