We are happy to announce that the Windows 10 related performance and timing issues of our sequencer products (Cubase, Nuendo, Sequel) have now been resolved with the latest Windows update. Microsoft released the necessary patch in close cooperation with Steinberg after our engineers identified the cause (changes had been made to the MMCSS subsystem of Windows).
This is why we can announce Windows 10 an officially supported operating system across the entire Steinberg product line.
UPDATE Please also have a look at our statement regarding the latest Windows 10 “Redstone” update from August 2016 here: Steinberg Forums