Those of you that need to update to Windows 10 before the end of the month, Nthusim 4.0.226 will work with most things but WDDM (desktop) mode. Until we have Nthusim 4.1 out, please bear in mind that you can use Nthusim 4.0.226 as long as you disable WDDM (desktop) mode in the Tools menu. This is not ideal, but will be a stop-gap measure until we have Nthusim 4.1 available. People are running out of time to get the free Microsoft Windows 10 upgrade, so I'm attempting to offer a few suggestions on how to keep on still using Nthusim and Windows 10 together until Nthusim 4.1 is out in a few weeks.
-Brad