No, windows 7, and might that be the issue?
I reverted to nw september version and works fine, so it seems to be just the latest version of it.
Not sure if that's the case, I just know that since the last "ground-breaking" update released by Microsoft (Anniversary), the drivers got a little messed up and caused a lot of issues for the most users that installed it. Maybe a part of this update was also pushed out for Win7 users, I don't really know since I don't actively update my OS anymore.
Ashley already did a bug report about this on git, so you might want to wait until the NWjs team takes action and works around the issues with their application.