https://bugs.winehq.org/show_bug.cgi?id=46015
--- Comment #4 from jorg.pavol@gmail.com --- Hi, thank you for resolving this problem.
I don't install GeForce NOW in Wine. I installed it in Windows 8.1, rebooted to Debian and trying to run it in wine-staging.
I'm not really sure if running installer in Wine is required because you can extract same files from installation file with 7z file extractor.
Also notice that running any game from GeForce NOW start new executable: GeForceNOWStreamer.exe
So this must run without errors too.