Only use the free Latency Mon on Win 10. It has been updated for Win 10.
I have been using Win 10 for a long time as I'm in the "insider program" which gets me pre-release versions. I haven't had any problems and even have lower, reliable, latency settings with my Roland Octa-Capture (and Studio-Capture) than I could use with Win 7 or Win 8/8.1.
With Win 7 and 8/8.1 I could use the 6 ms latency setting. With Win 10 I can use the 4 ms latency setting.