Maybe you could try running as administrator to see if that makes a difference?
Also, could you try going into Program Files/EspruinoWebIDE and renaming package.nw to something else, then running the executable in that folder? It should pop up a bare nw.js window... That'll test whether nw.js itself works properly at least.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Maybe you could try running as administrator to see if that makes a difference?
Also, could you try going into
Program Files/EspruinoWebIDE
and renamingpackage.nw
to something else, then running the executable in that folder? It should pop up a bare nw.js window... That'll test whether nw.js itself works properly at least.