When I got the Ten Tec Orion 2, I needed a real serial port. I thought this would be a good time to get one a 4 port USB – Serial converter. I opted for the Keyspan USA-49WG as I have had good luck with that brand on my Mac. It has worked mostly OK, but I do get random blue screens of death ( BSOD ). The crash dump reports the 49WG driver. I opened a ticket with Tripp Lite on 28 Dec 2012. I will report back on what happens. Note I am running this with Windows 7 Ultimate 64 bit on a Dell XPS PC (that was for the search engines).