I have a couple of Presonus Firebox audio interfaces that are FireWire 400 based and needed a way to connect them to my Asus PC Laptop running Windows 10 (which surprisingly has a Thunderbolt connector!), so I decided to go with this. I was very glad to find that it was easily recognized by my PC. Since this gives you a FireWire 800 connection, I also connected a FireWire 800 to FireWire 400 adapter. And sure enough, it still worked! The only problem I ran into was that this did not provide enough power to the Firebox units, so I had to use their separate power adapters, but no biggie there!